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Magdalena Zgliczyńska Department of Obstetrics, Perinatology and Neonatology, Centre of Postgraduate Medical Education, Cegłowska, Warsaw, Poland

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Magdalena Ostrowska Department of Endocrinology, Centre of Postgraduate Medical Education, Cegłowska, Warsaw, Poland

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Kinga Żebrowska Department of Obstetrics, Perinatology and Neonatology, Centre of Postgraduate Medical Education, Cegłowska, Warsaw, Poland

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Iwona Szymusik Department of Obstetrics, Perinatology and Neonatology, Centre of Postgraduate Medical Education, Cegłowska, Warsaw, Poland

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Konrad Kowalski Masdiag Sp. z o.o., Stefana Żeromskiego, Warsaw, Poland

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Dorota Leszczyńska Department of Endocrinology, Centre of Postgraduate Medical Education, Cegłowska, Warsaw, Poland

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Katarzyna Kosińska-Kaczyńska Department of Obstetrics, Perinatology and Neonatology, Centre of Postgraduate Medical Education, Cegłowska, Warsaw, Poland

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mass spectrometry (LC-MS/MS), which is free from numerous limitations of CLIA and other immunoassays, remains the gold standard for 25(OH)D testing ( 28 ). It also offers an additional benefit, i.e. the possibility of determining other vitamin D

Article Type:
Research Article
Collections:
Reproduction
DOI:
https://doi.org/10.1530/EC-23-0201
Volume/Issue:
Volume 12: Issue 11
Open access
Paal Methlie Department of Clinical Science, Department of Medicine, University of Bergen, N-5021 Bergen, Norway
Department of Clinical Science, Department of Medicine, University of Bergen, N-5021 Bergen, Norway

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Steinar Hustad Department of Clinical Science, Department of Medicine, University of Bergen, N-5021 Bergen, Norway

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Ralf Kellman Department of Clinical Science, Department of Medicine, University of Bergen, N-5021 Bergen, Norway

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Bjørg Almås Department of Clinical Science, Department of Medicine, University of Bergen, N-5021 Bergen, Norway

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Martina M Erichsen Department of Clinical Science, Department of Medicine, University of Bergen, N-5021 Bergen, Norway

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Eystein S Husebye Department of Clinical Science, Department of Medicine, University of Bergen, N-5021 Bergen, Norway
Department of Clinical Science, Department of Medicine, University of Bergen, N-5021 Bergen, Norway

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Kristian Løvås Department of Clinical Science, Department of Medicine, University of Bergen, N-5021 Bergen, Norway
Department of Clinical Science, Department of Medicine, University of Bergen, N-5021 Bergen, Norway

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factors likely to slow its adoption. The development of simple, reliable, and cost- and labour-efficient methods is, therefore, important. Liquid chromatography coupled to tandem mass spectrometry (LC–MS/MS) is a highly selective mode of detection. It

Article Type:
Research Article
DOI:
https://doi.org/10.1530/EC-13-0023
Volume/Issue:
Volume 2: Issue 3
Open access
Fidéline Bonnet-Serrano Université Paris Cité, Paris, France
Inserm U1016-CNRS UMR8104, Paris, France
Hormonology Department, Cochin Hospital, Paris, France

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Maxime Barat Université Paris Cité, Paris, France
Inserm U1016-CNRS UMR8104, Paris, France
Radiology Department, Cochin Hospital, Paris, France

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Anna Vaczlavik Université Paris Cité, Paris, France
Inserm U1016-CNRS UMR8104, Paris, France
Reference Center for Rare Adrenal Diseases, Endocrinology Department, Cochin Hospital, Paris, France

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Anne Jouinot Inserm U1016-CNRS UMR8104, Paris, France

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Lucas Bouys Université Paris Cité, Paris, France
Inserm U1016-CNRS UMR8104, Paris, France
Reference Center for Rare Adrenal Diseases, Endocrinology Department, Cochin Hospital, Paris, France

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Christelle Laguillier-Morizot Université Paris Cité, Paris, France
Hormonology Department, Cochin Hospital, Paris, France
INSERM, Physiopathologie et Pharmacotoxicologie Placentaire Humaine : Microbiote Pré & Post natal, Paris, France

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Corinne Zientek Hormonology Department, Cochin Hospital, Paris, France

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Catherine Simonneau Hormonology Department, Cochin Hospital, Paris, France

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Etienne Larger Université Paris Cité, Paris, France
Inserm U1016-CNRS UMR8104, Paris, France
Diabetology Department, Cochin Hospital, Paris, France

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Laurence Guignat Reference Center for Rare Adrenal Diseases, Endocrinology Department, Cochin Hospital, Paris, France

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Lionel Groussin Université Paris Cité, Paris, France
Inserm U1016-CNRS UMR8104, Paris, France
Reference Center for Rare Adrenal Diseases, Endocrinology Department, Cochin Hospital, Paris, France

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Guillaume Assié Université Paris Cité, Paris, France
Inserm U1016-CNRS UMR8104, Paris, France
Reference Center for Rare Adrenal Diseases, Endocrinology Department, Cochin Hospital, Paris, France

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Jean Guibourdenche Université Paris Cité, Paris, France
Hormonology Department, Cochin Hospital, Paris, France
INSERM, Physiopathologie et Pharmacotoxicologie Placentaire Humaine : Microbiote Pré & Post natal, Paris, France

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Ioannis Nicolis Université Paris Cité, Paris, France
UR 7537 BioSTM, Paris, France

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Marie-Claude Menet Institut de Chimie Physique, Université Paris-Saclay-CNRS, UMR8000, Orsay, France

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Jérôme Bertherat Université Paris Cité, Paris, France
Inserm U1016-CNRS UMR8104, Paris, France
Reference Center for Rare Adrenal Diseases, Endocrinology Department, Cochin Hospital, Paris, France

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with tandem mass spectrometry (LC-MS/MS) in the basal state and after ACTH 1-24 stimulation. Materials and methods Patients and samples Patients investigated in the Endocrinology department of Cochin Hospital between 2018 December and 2021

Article Type:
Research Article
Collections:
Adrenal
DOI:
https://doi.org/10.1530/EC-22-0063
Volume/Issue:
Volume 11: Issue 8
Open access
Sandra R Dahl Hormone Laboratory, Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway

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Ingrid Nermoen Institute of Clinical Medicine, University of Oslo, Oslo, Norway
Division of Medicine, Akershus University Hospital, Lørenskog, Norway

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Ingeborg Brønstad National Centre for Ultrasound in Gastroenterology, Haukeland University Hospital, Bergen, Norway
Department of Clinical Medicine, University of Bergen, Bergen, Norway

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Eystein S Husebye Department of Clinical Science, University of Bergen, Bergen, Norway
K.G. Jebsen-Center for Autoimmune Diseases, University of Bergen, Bergen, Norway
Department of Medicine, Haukeland University Hospital, Bergen, Norway

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Kristian Løvås Department of Clinical Science, University of Bergen, Bergen, Norway
K.G. Jebsen-Center for Autoimmune Diseases, University of Bergen, Bergen, Norway
Department of Medicine, Haukeland University Hospital, Bergen, Norway

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Per M Thorsby Hormone Laboratory, Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway

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(LC–MS/MS) has emerged as the method of choice for determination of steroid hormones. Advantages include its superior specificity compared to immunoassays, the possibility for multiplexing and low sample volume ( 10 ). This enables simultaneous

Article Type:
Research Article
DOI:
https://doi.org/10.1530/EC-18-0453
Volume/Issue:
Volume 7: Issue 12
Open access
T P Parikh Program in Reproductive and Adult Endocrinology, National Institute of Child Health and Human Development, National Institutes of Health (NIH), Bethesda, Maryland, USA

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B Stolze Department of Laboratory Medicine, Clinical Center, NIH, Bethesda, Maryland, USA

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Y Ozarda Department of Medical Biochemistry, Faculty of Medicine, Uludag University, Bursa, Turkey

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J Jonklaas Division of Endocrinology and Metabolism, Department of Medicine, Georgetown University, Washington, District of Columbia, USA

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K Welsh Department of Laboratory Medicine, Clinical Center, NIH, Bethesda, Maryland, USA

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L Masika Department of Laboratory Medicine and Pathology/National Health Laboratory Service Walter Sisulu University, Mthatha, South Africa

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M Hill Program in Reproductive and Adult Endocrinology, National Institute of Child Health and Human Development, National Institutes of Health (NIH), Bethesda, Maryland, USA

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A DeCherney Program in Reproductive and Adult Endocrinology, National Institute of Child Health and Human Development, National Institutes of Health (NIH), Bethesda, Maryland, USA

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S J Soldin Department of Laboratory Medicine, Clinical Center, NIH, Bethesda, Maryland, USA
Division of Endocrinology and Metabolism, Department of Medicine, Georgetown University, Washington, District of Columbia, USA

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participants by an LC–MS/MS method primarily developed for diagnosis and subtyping of patients with disorders of adrenal function and steroidogenesis. Subjects and methods Subjects and specimens Subjects included 182 healthy patients all providing

Article Type:
Research Article
DOI:
https://doi.org/10.1530/EC-18-0417
Volume/Issue:
Volume 7: Issue 12
Open access
Marloes L P Langelaan Clinical Laboratory, Catharina Hospital Eindhoven, Eindhoven, The Netherlands
Department of Clinical Chemistry and Haematology, Zuyderland Medical Centre, Heerlen, The Netherlands

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Jérôme M H Kisters Department of Internal Medicine, Catharina Hospital Eindhoven, Eindhoven, The Netherlands

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Mirjam M Oosterwerff Department of Internal Medicine, Catharina Hospital Eindhoven, Eindhoven, The Netherlands

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Arjen-Kars Boer Clinical Laboratory, Catharina Hospital Eindhoven, Eindhoven, The Netherlands

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concentrations in healthy individuals would hamper the identification of AI ( 1 ). However, novel liquid chromatography tandem-mass spectrometry (LC–MS/MS) techniques have made it possible to increase accuracy and sensitivity in the determination of salivary

Article Type:
Research Article
DOI:
https://doi.org/10.1530/EC-18-0085
Volume/Issue:
Volume 7: Issue 4
Open access
Paul-Martin Holterhus Department of Pediatrics I, Pediatric Endocrinology and Diabetology, University Hospital of Schleswig-Holstein, UKSH, Campus Kiel and Christian Albrechts University, CAU, Kiel, Germany

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Alexandra Kulle Department of Pediatrics I, Pediatric Endocrinology and Diabetology, University Hospital of Schleswig-Holstein, UKSH, Campus Kiel and Christian Albrechts University, CAU, Kiel, Germany

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Anne-Marie Till Department of Pediatrics, Pediatric Hematology and Oncology, University Hospital of Schleswig-Holstein, UKSH, Campus Lübeck, Germany

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Caroline Stille Department of Pediatrics, Pediatric Hematology and Oncology, University Hospital of Schleswig-Holstein, UKSH, Campus Lübeck, Germany

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Tabea Lamprecht Department of Pediatrics I, Pediatric Endocrinology and Diabetology, University Hospital of Schleswig-Holstein, UKSH, Campus Kiel and Christian Albrechts University, CAU, Kiel, Germany

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Simon Vieth Department of Pediatrics I, Pediatric Hematology and Oncology, University Hospital of Schleswig-Holstein, UKSH, Campus Kiel and Christian-Albrechts-University, CAU, Kiel, Germany

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Melchior Lauten Department of Pediatrics, Pediatric Hematology and Oncology, University Hospital of Schleswig-Holstein, UKSH, Campus Lübeck, Germany

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chromatography tandem mass spectrometry (LC–MS/MS) is today’s gold standard for determining serum steroids. We aimed to investigate LC–MS/MS steroid profiles of childhood ALL serum samples, encompassing cortisol and aldosterone as well as their precursors

Article Type:
Research Article
Collections:
Adrenal
DOI:
https://doi.org/10.1530/EC-23-0002
Volume/Issue:
Volume 12: Issue 10
Open access
Letícia Ribeiro Oliveira Interdisciplinary Group for Studies of Sex Determination and Differentiation (GIEDDS), School of Medical Sciences (FCM), State University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
Department of Pediatrics, Federal University of Uberlandia (UFU), Uberlandia, Minas Gerais, Brazil

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Carlos Alberto Longui Pediatric Endocrinology Unit, School of Medical Sciences, Irmandade da Santa Casa de Misericordia de Sao Paulo, Sao Paulo, Brazil

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Guilherme Guaragna-Filho Interdisciplinary Group for Studies of Sex Determination and Differentiation (GIEDDS), School of Medical Sciences (FCM), State University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
Department of Pediatrics, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil

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José Luiz Costa School of Pharmaceutical Sciences, UNICAMP, Campinas, Sao Paulo, Brazil
Poison Control Center, FCM, UNICAMP, Campinas, Sao Paulo, Brazil

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Rafael Lanaro Poison Control Center, FCM, UNICAMP, Campinas, Sao Paulo, Brazil

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David Antônio Silva Laboratory of Physiology, Division of Clinical Pathology, Clinical Hospital, UNICAMP, Campinas, Sao Paulo, Brazil

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Maria Izabel Chiamolera Fleury Group, Sao Paulo, Brazil

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Maricilda Palandi de Mello Interdisciplinary Group for Studies of Sex Determination and Differentiation (GIEDDS), School of Medical Sciences (FCM), State University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
Laboratory of Human Molecular Genetics, Center for Molecular Biology and Genetics Engineering (CBMEG), UNICAMP, Campinas, Sao Paulo, Brazil

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André Moreno Morcillo Department of Pediatrics, FCM, UNICAMP, Campinas, Sao Paulo, Brazil

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Andrea Trevas Maciel-Guerra Interdisciplinary Group for Studies of Sex Determination and Differentiation (GIEDDS), School of Medical Sciences (FCM), State University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
Department of Medical Genetics and Genomic Medicine, FCM, UNICAMP, Campinas, Sao Paulo, Brazil

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Gil Guerra-Junior Interdisciplinary Group for Studies of Sex Determination and Differentiation (GIEDDS), School of Medical Sciences (FCM), State University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
Department of Pediatrics, FCM, UNICAMP, Campinas, Sao Paulo, Brazil

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laboratories ( 3 , 4 ). More recently, liquid chromatography coupled with mass spectrometry in tandem (LC-MS/MS) has replaced conventional methods of steroid hormone analysis, enabling the use of small volume samples, improving specificity and reducing the

Article Type:
Research Article
Collections:
Paediatric Endocrinology Collection
DOI:
https://doi.org/10.1530/EC-20-0454
Volume/Issue:
Volume 9: Issue 11
Open access
Muriel Houang Laboratoire des Explorations Fonctionnelles Endocriniennes, Hôpital Armand Trousseau, AP-HP Sorbonne Université, Paris, France

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Thao Nguyen-Khoa Centre Régional de Dépistage Néonatal-Ile de France, Hôpital Necker-Enfants Malades, AP-HP Centre Université de Paris, Paris, France

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Thibaut Eguether Sorbonne Université, INSERM, Centre de Recherche Saint-Antoine, Paris, France
Département de Métabolomique Clinique, Hôpital Saint-Antoine, AP-HP Sorbonne Université, Paris, France

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Bettina Ribault Sorbonne Université, INSERM, Centre de Recherche Saint-Antoine, Paris, France
Département de Métabolomique Clinique, Hôpital Saint-Antoine, AP-HP Sorbonne Université, Paris, France

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Séverine Brabant Laboratoire d’Explorations Fonctionnelles, Hôpital Necker-Enfants Malades, AP-HP Centre Université de Paris, Paris, France

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Michel Polak Centre Régional de Dépistage Néonatal-Ile de France, Hôpital Necker-Enfants Malades, AP-HP Centre Université de Paris, Paris, France
Université de Paris, INSERM, Institut IMAGINE, Hôpital Necker-Enfants Malades, AP-HP, Paris, France

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Irène Netchine Laboratoire des Explorations Fonctionnelles Endocriniennes, Hôpital Armand Trousseau, AP-HP Sorbonne Université, Paris, France
Sorbonne Université, INSERM, Centre de Recherche Saint-Antoine, Paris, France
Hôpital Armand Trousseau, AP-HP Sorbonne Université, Paris, France

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Antonin Lamazière Sorbonne Université, INSERM, Centre de Recherche Saint-Antoine, Paris, France
Département de Métabolomique Clinique, Hôpital Saint-Antoine, AP-HP Sorbonne Université, Paris, France

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the FIA has to be adapted to gestational age and weight ( 9 , 11 ). Some countries use LC-MS/MS as a second-tier approach for DBS analysis related to CAH to reduce false positives , although France has not proposed this yet ( 5 , 12 ). On the other

Article Type:
Research Article
Collections:
Paediatric Endocrinology
DOI:
https://doi.org/10.1530/EC-22-0101
Volume/Issue:
Volume 11: Issue 6
Open access
Niek F Dirks Atalmedial Diagnostics Centre, Spaarne Gasthuis, Haarlem, The Netherlands
Department of Clinical Chemistry, Hematology and Immunology, Noordwest Ziekenhuis, Alkmaar, The Netherlands

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Etienne Cavalier Department of Clinical Chemistry, University of Liège, CHU de Liège, Liège, Belgium

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Annemieke C Heijboer Amsterdam UMC location Vrije Universiteit Amsterdam, Department of Clinical Chemistry, Endocrine Laboratory, Boelelaan, Amsterdam, The Netherlands
Amsterdam Gastroenterology, Endocrinology & Metabolism, Amsterdam, The Netherlands
Amsterdam UMC location University of Amsterdam, Department of Clinical Chemistry, Endocrine Laboratory, Amsterdam, The Netherlands
Amsterdam Reproduction & Development Research Institute, Amsterdam, The Netherlands

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). Measurement results are therefore to be reported in ‘nmol/L’ in the case of 25(OH)D and 24,25(OH) 2 D or ‘pmol/L’ for 1,25(OH) 2 D. Measurement preanalysis For 25(OH)D, both automated assays and liquid chromatography–tandem mass spectrometry (LC-MS/MS

Article Type:
Review Article
Collections:
Bone and Mineral Metabolism
DOI:
https://doi.org/10.1530/EC-22-0269
Volume/Issue:
Volume 12: Issue 4
Open access