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Soraya Puglisi Internal Medicine 1, Department of Clinical and Biological Sciences, University of Turin, Turin, Italy

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Paola Perotti Internal Medicine 1, Department of Clinical and Biological Sciences, University of Turin, Turin, Italy

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Mattia Barbot Endocrinology Unit, Department of Medicine DIMED, University of Padua, Padua, Italy

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Paolo Cosio Internal Medicine 1, Department of Clinical and Biological Sciences, University of Turin, Turin, Italy

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Carla Scaroni Endocrinology Unit, Department of Medicine DIMED, University of Padua, Padua, Italy

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Antonio Stigliano Endocrinology Unit, Department of Clinical and Molecular Medicine, Sant’Andrea Hospital University of Rome, Rome, Italy

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Pina Lardo Endocrinology Unit, Department of Clinical and Molecular Medicine, Sant’Andrea Hospital University of Rome, Rome, Italy

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Valentina Morelli Endocrinology Unit, Department of Clinical Sciences and Community Health, University of Milan and Fondazione IRCCS Ca’ Granda, Ospedale Maggiore Policlinico, Milano, Italy

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Elisa Polledri Department of Clinical Sciences and Community Health, Laboratory of Toxicology, University of Milan and Fondazione IRCCS Ca’ Granda, Ospedale Maggiore Policlinico, Milan, Italy

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Iacopo Chiodini Endocrinology Unit, Department of Clinical Sciences and Community Health, University of Milan and Fondazione IRCCS Ca’ Granda, Ospedale Maggiore Policlinico, Milano, Italy

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Giuseppe Reimondo Internal Medicine 1, Department of Clinical and Biological Sciences, University of Turin, Turin, Italy

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Anna Pia Internal Medicine 1, Department of Clinical and Biological Sciences, University of Turin, Turin, Italy

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Massimo Terzolo Internal Medicine 1, Department of Clinical and Biological Sciences, University of Turin, Turin, Italy

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androstenedione levels by LC–MS/MS, an IVD-MS steroids serum kit (MassChrom, Steroids in Serum/Plasma, Chromsystems, Gräfelfing, Germany) was used. Chromatographic separation and mass spectrometry of the samples was performed with a high-performance liquid

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Maria Luisa Brandi Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy
Fondazione Italiana Ricerca sulle Malattie dell’Osso (FIRMO Onlus), Florence, Italy

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Stefania Bandinelli Geriatric Unit, Azienda Sanitaria Toscana Centro, Florence, Italy

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Teresa Iantomasi Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy

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Francesca Giusti Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy

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Eleonora Talluri Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy

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Giovanna Sini Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy

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Fabrizio Nannipieri Clinical Research, Abiogen Pharma, Pisa, Italy

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Santina Battaglia Clinical Research, Abiogen Pharma, Pisa, Italy

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Riccardo Giusti Clinical Research, Abiogen Pharma, Pisa, Italy

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Colin Gerard Egan CE Medical Writing SRLS, Pisa, Italy

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Luigi Ferrucci Longitudinal Study Section, Translation Gerontology Branch, National Institute on Aging, Baltimore, Maryland, USA

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to a reference procedure (isotope dilution mass spectrometry) and automatized on a Cobas 8000. Serum VDBP was measured by enzyme-linked immuno assay method (R&D Systems). BPA analysis was performed on urine samples using the HPLC/mass spectrometry by

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Simone Martins de Castro Hospital Materno Infantil Presidente Vargas, Newborn Screening Referral Center, Porto Alegre, RS, Brazil
Department of Analysis, Universidade Federal do Rio Grande do Sul (UFRGS), School of Pharmacy, Porto Alegre, RS, Brazil

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Paloma Wiest Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil

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Poli Mara Spritzer Division of Endocrinology, Department of Physiology, Universidade Federal do Rio Grande do Sul (UFRGS), Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, RS, Brazil

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Cristiane Kopacek Hospital Materno Infantil Presidente Vargas, Newborn Screening Referral Center, Porto Alegre, RS, Brazil
Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil
Department of Pediatrics, Universidade Federal do Rio Grande do Sul (UFRGS), Medical School, Porto Alegre, RS, Brazil

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spectrometry . Clinica Chimica Acta 2010 411 222 – 228 . ( https://doi.org/10.1016/j.cca.2009.11.007 ) 29 Carvalho VM Nakamura OH & Vieira JGH . Simultaneous quantitation of seven endogenous C-21 adrenal steroids by liquid chromatography tandem mass

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Agnieszka Adamska Department of Endocrinology, Diabetology and Internal Medicine, Medical University of Białystok, Białystok, Poland

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Aleksandra Maria Polak Department of Internal Medicine and Metabolic Diseases, Medical University of Białystok, Białystok, Poland

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Anna Krentowska Department of Internal Medicine and Metabolic Diseases, Medical University of Białystok, Białystok, Poland

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Agnieszka Łebkowska Department of Internal Medicine and Metabolic Diseases, Medical University of Białystok, Białystok, Poland

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Justyna Hryniewicka Department of Endocrinology, Diabetology and Internal Medicine, Medical University of Białystok, Białystok, Poland

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Monika Leśniewska Department of Reproduction and Gynecological Endocrinology, Medical University of Białystok, Białystok, Poland

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Irina Kowalska Department of Internal Medicine and Metabolic Diseases, Medical University of Białystok, Białystok, Poland

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, 32 , 33 , 34 ). Another possible limitation of the present study could be the measurement of total testosterone by RIA and not with the liquid chromatography-tandem mass spectrometry (LC-MS) method. However, LC-MS is not widely used due to the costs

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Thomas Reinehr Department of Pediatric Endocrinology, Diabetes, and Nutrition Medicine, Vestische Hospital for Children and Adolescents, University of Witten/Herdecke, Datteln, Germany

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Alexandra Kulle Division of Pediatric Endocrinology and Diabetes, Department of Pediatrics, University Hospital of Schleswig – Holstein, UKSH, Campus Kiel/Christian Albrechts University of Kiel, CAU, Kiel, Germany

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Juliane Rothermel Department of Pediatric Endocrinology, Diabetes, and Nutrition Medicine, Vestische Hospital for Children and Adolescents, University of Witten/Herdecke, Datteln, Germany

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Caroline Knop-Schmenn Department of Pediatric Endocrinology, Diabetes, and Nutrition Medicine, Vestische Hospital for Children and Adolescents, University of Witten/Herdecke, Datteln, Germany

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Nina Lass Department of Pediatric Endocrinology, Diabetes, and Nutrition Medicine, Vestische Hospital for Children and Adolescents, University of Witten/Herdecke, Datteln, Germany

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Christina Bosse Department of Pediatric Endocrinology, Diabetes, and Nutrition Medicine, Vestische Hospital for Children and Adolescents, University of Witten/Herdecke, Datteln, Germany

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Paul-Martin Holterhus Division of Pediatric Endocrinology and Diabetes, Department of Pediatrics, University Hospital of Schleswig – Holstein, UKSH, Campus Kiel/Christian Albrechts University of Kiel, CAU, Kiel, Germany

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, mineralocorticoids and sex hormones are a challenge because of the relatively low specificity of ELISA and RIA. Hence, the state-of-the-art method is a liquid chromatography–tandem mass spectrometry (LC–MS/MS) steroid profiling method ( 7 ), which we have used in

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Britt J van Keulen Emma Children’s Hospital, Amsterdam UMC, Vrije Universiteit Amsterdam, Pediatric Endocrinology, Amsterdam, The Netherlands

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Conor V Dolan Department of Biological Psychology, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands

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Bibian van der Voorn Department of Pediatric Endocrinology, Sophia Kinderziekenhuis, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands

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Ruth Andrew Centre for Cardiovascular Science, University of Edinburgh, Queen’s Medical Research Institute, Edinburgh, UK

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Brian R Walker Centre for Cardiovascular Science, University of Edinburgh, Queen’s Medical Research Institute, Edinburgh, UK
Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, UK

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Hilleke Hulshoff Pol Department of Psychiatry, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands

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Dorret I Boomsma Department of Biological Psychology, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands

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Joost Rotteveel Emma Children’s Hospital, Amsterdam UMC, Vrije Universiteit Amsterdam, Pediatric Endocrinology, Amsterdam, The Netherlands

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Martijn J J Finken Emma Children’s Hospital, Amsterdam UMC, Vrije Universiteit Amsterdam, Pediatric Endocrinology, Amsterdam, The Netherlands

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were stored at −20°C and then at −80°C. Samples were thawed only once just before analysis. Laboratory analysis The analysis of cortisol metabolites was conducted at the Edinburgh Clinical Research Facility Mass Spectrometry Core Laboratory

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Sebastião Freitas de Medeiros Department of Gynecology and Obstetrics, Medical School, Federal University of Mato Grosso, Cuiabá, Mato Grosso, Brazil
Tropical Institute of Reproductive Medicine and Menopause, Cuiabá, Mato Grosso, Brazil

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Cinthia Marenza Ormond Tropical Institute of Reproductive Medicine and Menopause, Cuiabá, Mato Grosso, Brazil

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Matheus Antônio Souto de Medeiros Tropical Institute of Reproductive Medicine and Menopause, Cuiabá, Mato Grosso, Brazil

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Nayara de Souza Santos Department of Gynecology and Obstetrics, Medical School, Federal University of Mato Grosso, Cuiabá, Mato Grosso, Brazil
Tropical Institute of Reproductive Medicine and Menopause, Cuiabá, Mato Grosso, Brazil

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Camila Regis Banhara Department of Gynecology and Obstetrics, Medical School, Federal University of Mato Grosso, Cuiabá, Mato Grosso, Brazil
Tropical Institute of Reproductive Medicine and Menopause, Cuiabá, Mato Grosso, Brazil

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Márcia Marly Winck Yamamoto Tropical Institute of Reproductive Medicine and Menopause, Cuiabá, Mato Grosso, Brazil

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study for T, 17-OHPE, 17-OHP4, and compound S and liquid chromatography tandem mass spectrometry have shown good agreement between the methods ( 28 , 29 ). Some adipocyte-derived products may induce the transcription of the StAR promoter protein and

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Srdjan Pandurevic Division of Endocrinology and Diabetes Prevention and Care, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Bologna, Italy

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Ilaria Mancini Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Bologna, Italy
Unit of Gynecology and Obstetrics, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Italy

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Dimitri Mitselman Division of Endocrinology and Diabetes Prevention and Care, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Bologna, Italy

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Matteo Magagnoli Division of Endocrinology and Diabetes Prevention and Care, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Bologna, Italy

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Rita Teglia Division of Endocrinology and Diabetes Prevention and Care, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Bologna, Italy

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Roberta Fazzeri Division of Endocrinology and Diabetes Prevention and Care, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Bologna, Italy

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Paola Dionese Division of Endocrinology and Diabetes Prevention and Care, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Bologna, Italy

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Carolina Cecchetti Division of Endocrinology and Diabetes Prevention and Care, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Bologna, Italy

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Massimiliamo Caprio Department of Human Sciences and Quality of Life Promotion, San Raffaele Roma Open University, Rome, Italy
Laboratory of Cardiovascular Endocrinology, IRCCS San Raffaele, Rome, Italy

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Costanzo Moretti Department of Systems Medicine, Unit of Endocrinology, University of Rome Tor Vergata, Rome, Italy

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Justyna Sicinska Dermatology Clinic of CSK MSWiA Hospital, Warsaw, Poland

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Alessandro Agostini Department of Experimental, Diagnostic, and Specialty Medicine, University of Bologna, Bologna, Italy

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Domenica Gazineo Teaching Hospital, S. Orsola Hospital, Bologna, Italy

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Lea Godino Teaching Hospital, S. Orsola Hospital, Bologna, Italy

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Ignacio Sajoux Epigenomics in Endocrinology and Nutrition Group, Instituto de Investigacion Sanitaria (IDIS), Complejo Hospitalario Universitario de Santiago (CHUS/SERGAS), Spain
Medical Department Pronokal Group, Barcelona, Spain

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Flaminia Fanelli Division of Endocrinology and Diabetes Prevention and Care, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Bologna, Italy

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Cristina M Meriggiola Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Bologna, Italy
Unit of Gynecology and Obstetrics, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Italy

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Uberto Pagotto Division of Endocrinology and Diabetes Prevention and Care, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Bologna, Italy

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Alessandra Gambineri Division of Endocrinology and Diabetes Prevention and Care, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum University of Bologna, Bologna, Italy

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OH-progesterone, and progesterone) by liquid chromatography-tandem mass spectrometry (LC-MS/MS), at the Center for Applied Biomedical Research of the University of Bologna, S. Orsola Hospital. The same day, a medical examination was made, during

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

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Anna G Nilsson Department of Internal Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
Department of Endocrinology, Sahlgrenska University Hospital, Gothenburg, Sweden

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

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

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

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permitted adjustments and thus, an estimation of the correlation between insulin at baseline and testosterone at follow-up. Second, measurements of testosterone were made with radioimmunoassay, which is considered less reliable than mass spectrometry

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Göran Oleröd Department of Clinical Chemistry and Transfusion Medicine, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden

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Lillemor Mattsson Hultén Department of Clinical Chemistry, Sahlgrenska University Hospital, Gothenburg, Sweden

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Ola Hammarsten Department of Clinical Chemistry and Transfusion Medicine, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden

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Eva Klingberg Department of Rheumatology and Inflammation Research, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden

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with European-Americans when DBP was measured with an immunoassay using monoclonal DBP antibodies, but not when measured with a mass spectrometry or immunoassays using polyclonal DBP antibodies ( 11 , 12 , 13 , 14 , 15 ). In a previous study, we

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