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Anna C van der Burgh Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, the Netherlands
Department of Epidemiology, Erasmus University Medical Center, Rotterdam, the Netherlands

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Samer R Khan Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, the Netherlands
Department of Epidemiology, Erasmus University Medical Center, Rotterdam, the Netherlands

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Sebastian J C M M Neggers Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, the Netherlands

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Ewout J Hoorn Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, the Netherlands

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Layal Chaker Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, the Netherlands
Department of Epidemiology, Erasmus University Medical Center, Rotterdam, the Netherlands

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methods for measuring serum testosterone were reported, including enzyme immunoassay (ELISA), liquid chromatography-tandem mass spectrometry, and radioimmunoassay (RIA) techniques. Serum DHEAS was measured by using chemiluminescent enzyme immunoassay or

Article Type:
Research Article
Collections:
Reproduction
DOI:
https://doi.org/10.1530/EC-22-0061
Volume/Issue:
Volume 11: Issue 6
Open access
Natalie Rogowski-Lehmann Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Munich, Germany

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Aikaterini Geroula Institut für Klinische Chemie und Laboratoriumsmedizin, Universitätsklinikum Carl Gustav Carus an der TU Dresden, Dresden, Germany

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Aleksander Prejbisz Department of Hypertension, Institute of Cardiology, Warsaw, Poland

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Henri J L M Timmers Section of Endocrinology, Department of Internal Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands

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Felix Megerle Medizinische Klinik und Poliklinik I des Universitätsklinikums Würzburg, Würzburg, Germany

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Mercedes Robledo Hereditary Endocrine Cancer Group, Human Cancer Genetics Programme, Spanish National Cancer Research Centre, Centro de Investigacion Biomedica en Red de Enfermedades Raras (CIBERER), Madrid, Spain

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Martin Fassnacht Medizinische Klinik und Poliklinik I des Universitätsklinikums Würzburg, Würzburg, Germany

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Stephanie M J Fliedner First Department of Medicine, University Medical Center Schleswig-Holstein, Lübeck, Germany

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Martin Reincke Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Munich, Germany

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Anthony Stell Department of Computing and Information, University of Melbourne, Melbourne Australia

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Andrzej Januszewicz Department of Hypertension, Institute of Cardiology, Warsaw, Poland

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Jacques W M Lenders Section of Endocrinology, Department of Internal Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
Medizinische Klinik III, Universitätsklinikum Carl Gustav Carus an der Technische Universität Dresden, Dresden, Germany

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Graeme Eisenhofer Institut für Klinische Chemie und Laboratoriumsmedizin, Universitätsklinikum Carl Gustav Carus an der TU Dresden, Dresden, Germany
Medizinische Klinik III, Universitätsklinikum Carl Gustav Carus an der Technische Universität Dresden, Dresden, Germany

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Felix Beuschlein Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Munich, Germany
Klinik für Endokrinologie, Diabetologie und Klinische Ernährung, Universitätsspital Zürich, Zürich, Switzerland

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.cca.2012.12.031 17 Peitzsch M Prejbisz A Kroiss M Beuschlein F Arlt W Januszewicz A Siegert G Eisenhofer G. Analysis of plasma 3-methoxytyramine, normetanephrine and metanephrine by ultraperformance liquid chromatography-tandem mass spectrometry

Article Type:
Research Article
DOI:
https://doi.org/10.1530/EC-18-0318
Volume/Issue:
Volume 7: Issue 11
Open access
Shenglong Le Exercise, Health and Technology Centre, Department of Physical Education, Shanghai Jiao Tong University, Shanghai, China
Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland

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Leiting Xu Medical School, Ningbo University, Ningbo, China

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Moritz Schumann Department of Molecular and Cellular Sports Medicine, German Sport University Cologne, Cologne, Germany
The Key Laboratory of Systems Biomedicine, Ministry of Education, and Exercise Translational Medicine Center, Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, China

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Na Wu Exercise, Health and Technology Centre, Department of Physical Education, Shanghai Jiao Tong University, Shanghai, China
Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland

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Timo Törmäkangas Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland

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Markku Alén Department of Medical Rehabilitation, Oulu University Hospital, Oulu, Finland

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Sulin Cheng Exercise, Health and Technology Centre, Department of Physical Education, Shanghai Jiao Tong University, Shanghai, China
Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
The Key Laboratory of Systems Biomedicine, Ministry of Education, and Exercise Translational Medicine Center, Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, China

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Petri Wiklund Exercise, Health and Technology Centre, Department of Physical Education, Shanghai Jiao Tong University, Shanghai, China
Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
Department of Epidemiology and Biostatistics, Centre for Environment and Health, School of Public Health, Imperial College London, London, UK
Center for Life Course Health Research, Faculty of Medicine, University of Oulu, Oulu, Finland

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androstenedione, testosterone, dihydrotestosterone, estrone and estradiol by gas chromatography–tandem mass spectrometry with sex- and puberty-specific reference intervals . Journal of Steroid Biochemistry and Molecular Biology 2018 183 116 – 124 . ( https

Article Type:
Research Article
DOI:
https://doi.org/10.1530/EC-19-0044
Volume/Issue:
Volume 8: Issue 5
Open access
C L Bodinham
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L Smith
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E L Thomas Nutrition, Metabolic and Molecular Imaging Group, Department of Food and Nutritional Sciences, Metabolism and Diabetes Research Group, Faculty of Health and Medical Sciences, University of Surrey, Leggett Building, Guildford, Surrey GU2 7WG, UK

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J D Bell Nutrition, Metabolic and Molecular Imaging Group, Department of Food and Nutritional Sciences, Metabolism and Diabetes Research Group, Faculty of Health and Medical Sciences, University of Surrey, Leggett Building, Guildford, Surrey GU2 7WG, UK

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J R Swann Nutrition, Metabolic and Molecular Imaging Group, Department of Food and Nutritional Sciences, Metabolism and Diabetes Research Group, Faculty of Health and Medical Sciences, University of Surrey, Leggett Building, Guildford, Surrey GU2 7WG, UK

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A Costabile Nutrition, Metabolic and Molecular Imaging Group, Department of Food and Nutritional Sciences, Metabolism and Diabetes Research Group, Faculty of Health and Medical Sciences, University of Surrey, Leggett Building, Guildford, Surrey GU2 7WG, UK

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D Russell-Jones
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A M Umpleby
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M D Robertson
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enzymatically for glucose concentration using a Cobas Mira (Roche Laboratories). Isotopic enrichment of the same plasma samples was measured by gas chromatography–mass spectrometry on an HP5971A mass selective detector (Agilent, Santa Clara, CA, USA). The

Article Type:
Research Article
DOI:
https://doi.org/10.1530/EC-14-0036
Volume/Issue:
Volume 3: Issue 2
Open access
Trine Holm Johannsen Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
International Centre for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

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Jakob Albrethsen Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
International Centre for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

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Vassos Neocleous The Cyprus Institute of Neurology and Genetics, Department of Molecular Genetics, Function and Therapy, Nicosia, Cyprus

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Federico Baronio S. Orsola-Malpighi University Hospital, Department of Medical and Surgical Sciences, Bologna, Italy

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Martine Cools Department of Pediatrics, Division of Pediatric Endocrinology, Ghent University Hospital and Department of Internal Medicine and Pediatrics, Ghent University, Ghent, Belgium

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Lise Aksglaede Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
International Centre for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

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Niels Jørgensen Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
International Centre for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

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Peter Christiansen Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
International Centre for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

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Meropi Toumba The Cyprus Institute of Neurology and Genetics, Department of Molecular Genetics, Function and Therapy, Nicosia, Cyprus
Pediatric Endocrinology Clinic, Department of Pediatrics, Aretaeio Hospital, Nicosia, Cyprus

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Pavlos Fanis The Cyprus Institute of Neurology and Genetics, Department of Molecular Genetics, Function and Therapy, Nicosia, Cyprus

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Marie Lindhardt Ljubicic Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
International Centre for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

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Anders Juul Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
International Centre for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
Department of Clinical Medicine, University of Copenhagen, Denmark

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function. When compared to testosterone, it has been reported to be more vulnerable to Leydig cell damage ( 7 ). Based on an established state-of-the-art liquid chromatography-tandem mass spectrometry (LC-MS/MS) technique for INSL3 quantification with

Article Type:
Research Article
Collections:
Adrenal
DOI:
https://doi.org/10.1530/EC-23-0073
Volume/Issue:
Volume 12: Issue 8
Open access
Amar Osmancevic School of Public Health and Community Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden

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Kristin Ottarsdottir School of Public Health and Community Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden

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Margareta Hellgren School of Public Health and Community Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden

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Ulf Lindblad School of Public Health and Community Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden

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Bledar Daka School of Public Health and Community Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden

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investigation of these associations in a prospective design. RIA technique has been considered a less reliable measurement method of testosterone levels compared to mass spectrometry, especially at lower levels ( 40 ). This could affect the precision and

Article Type:
Research Article
Collections:
Reproduction
DOI:
https://doi.org/10.1530/EC-22-0141
Volume/Issue:
Volume 11: Issue 7
Open access
Xiaohui Weng School of Mechanical and Aerospace Engineering, Jilin University, Changchun, China
Weihai Institute for Bionics, Jilin University, Weihai, China

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Gehong Li School of Mathematics, Jilin University, Changchun, China

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Ziwei Liu Department of endocrinology, Jinshan Branch of Shanghai Sixth People's Hospital, Shanghai, China

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Rui Liu Department of VIP Unit, China-Japan Union Hospital of Jilin University, Changchun, China

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Zhaoyang Liu Digital Intelligent Cockpit Department, Intelligent Connected Vehicle Development Institute, China FAW Group Co LTD, Changchun, China

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Songyang Wang Digital Intelligent Cockpit Department, Intelligent Connected Vehicle Development Institute, China FAW Group Co LTD, Changchun, China

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Shishun Zhao School of Mathematics, Jilin University, Changchun, China

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Xiaotong Ma School of Mathematics, Jilin University, Changchun, China

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Zhiyong Chang Weihai Institute for Bionics, Jilin University, Weihai, China
College of Biological and Agricultural Engineering, Jilin University, Changchun, China
Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun, China

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detection of disease types ( 1 ). Related technologies such as gas chromatography-mass spectrometry and ion mobility spectroscopy can be used to analyze the components in patients' breath ( 2 ). However, the high cost, inconvenience to carry, and complex

Article Type:
Research Article
Collections:
Metabolic Syndrome and Diabetes
DOI:
https://doi.org/10.1530/EC-22-0437
Volume/Issue:
Volume 12: Issue 3
Open access
Shane M Regnier Committee on Molecular Metabolism and Nutrition, Chicago, Illinois, USA
Pritzker School of Medicine, Chicago, Illinois, USA
University of Chicago, Chicago, Illinois, USA

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Andrew G Kirkley University of Chicago, Chicago, Illinois, USA
Committee on Molecular Pathogenesis and Molecular Medicine, Chicago, Illinois, USA

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Daniel Ruiz Committee on Molecular Metabolism and Nutrition, Chicago, Illinois, USA
University of Chicago, Chicago, Illinois, USA

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Wakanene Kamau University of Chicago, Chicago, Illinois, USA

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Qian Wu Wadsworth Center, New York Department of Health, Albany, New York, USA

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Kurunthachalam Kannan Wadsworth Center, New York Department of Health, Albany, New York, USA

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Robert M Sargis Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA

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conditions. The tandem mass spectrometry was operated in the positive ionization mode with the ion spray voltage of 5500 V. The mass transition for TF was 347 > 137. The dwell time was 400 ms. Collision energy was 32 V for TF. All other parameters were

Article Type:
Research Article
DOI:
https://doi.org/10.1530/EC-17-0320
Volume/Issue:
Volume 7: Issue 1
Open access
Lachlan Angus Department of Medicine (Austin Health), The University of Melbourne, Heidelberg, Victoria, Australia

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Shalem Leemaqz Robinson Research Institute, Adelaide Medical School, The University of Adelaide, Adelaide, South Australia

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Olivia Ooi Department of Medicine (Austin Health), The University of Melbourne, Heidelberg, Victoria, Australia

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Pauline Cundill Equinox Gender Diverse Clinic, Thorne Harbour Health, Fitzroy, Victoria, Australia

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Nicholas Silberstein Equinox Gender Diverse Clinic, Thorne Harbour Health, Fitzroy, Victoria, Australia

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Peter Locke Equinox Gender Diverse Clinic, Thorne Harbour Health, Fitzroy, Victoria, Australia

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Jeffrey D Zajac Department of Medicine (Austin Health), The University of Melbourne, Heidelberg, Victoria, Australia

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Ada S Cheung Department of Medicine (Austin Health), The University of Melbourne, Heidelberg, Victoria, Australia

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chromatography-tandem mass spectrometry (LC-MS)), as sex steroid concentrations were performed as part of standard care for clinical decision-making. As a result, sex steroid concentrations were performed at various NATA-accredited laboratories. Nonetheless, this

Article Type:
Research Article
DOI:
https://doi.org/10.1530/EC-19-0272
Volume/Issue:
Volume 8: Issue 7
Open access
Katrine M Lauritsen Steno Diabetes Center Aarhus, Aarhus, Denmark
Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
Danish Diabetes Academy, Odense University Hospital, Odense, Denmark

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Jens Hohwü Voigt Steno Diabetes Center Aarhus, Aarhus, Denmark

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Steen Bønløkke Pedersen Steno Diabetes Center Aarhus, Aarhus, Denmark
Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark

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Troels K Hansen Steno Diabetes Center Aarhus, Aarhus, Denmark

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Niels Møller Steno Diabetes Center Aarhus, Aarhus, Denmark
Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark

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Niels Jessen Steno Diabetes Center Aarhus, Aarhus, Denmark
Department of Biomedicine, Aarhus University, Aarhus, Denmark

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Lars C Gormsen Department of Nuclear Medicine and PET Centre, Aarhus University Hospital, Aarhus, Denmark

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Esben Søndergaard Steno Diabetes Center Aarhus, Aarhus, Denmark
Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
Danish Diabetes Academy, Odense University Hospital, Odense, Denmark

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, Ohio, USA). Samples for the measurement of 3-hydroxybutyrate (3-OHB) were stored at −20°C and other samples were stored at −80°C until batch analysis. 3-OHB concentrations in serum were quantified using liquid chromatography-tandem mass spectrometry

Article Type:
Research Article
Collections:
Metabolic Syndrome and Diabetes
DOI:
https://doi.org/10.1530/EC-21-0558
Volume/Issue:
Volume 11: Issue 4
Open access