aCentre of Child and Adolescent Medicine, Paediatric Endocrinology and Diabetology, Justus Liebig University, Giessen, Germany; bInstitute of Clinical Chemistry and Laboratory Medicine, University Hospital Carl Gustav Carus at the TU Dresden, Dresden, Germany
aPediatric Endocrinology, Derince Training and Research Hospital, Kocaeli, Turkey; bPhysiology, Derince Training and Research Hospital, Kocaeli, Turkey
aUniversity Pediatric Hospital Sofia/Medical University Sofia, Screening and Functional Endocrine Diagnostics, Sofia, Bulgaria; bDepartment of Medical Chemistry and Biochemistry, Medical University Sofia, Sofia, Bulgaria; cGenetic Medico-Diagnostic Laboratory Genica, Sofia, Bulgaria
aPediatric Endocrinology Unit, Tepecik Training and Research Hospital, Izmir, Turkey; bDepartment of Pediatrics, Tepecik Training and Research Hospital, Izmir, Turkey; cDepartment of Pediatric Endocrinology, Katip Celebi University, Izmir, Turkey
aDepartment of Medical Chemistry and Biochemistry, Medical University, Sofia, Bulgaria; bGenetic Medico-Diagnostic Laboratory Genica, Sofia, Bulgaria; cUniversity Pediatric Hospital, Screening and Functional Endocrine Diagnostics Medical University, Sofia, Bulgaria
aPediatric Unit, Department of Medical and Surgical Sciences, Program of Endocrinology, University of Bologna and S.Orsola-Malpighi Hospital, Bologna, Italy; bEmergency Pediatric Unit, University of Bologna and S.Orsola Malpighi Hospital, Bologna, Italy; cWilliam Harvey Research Institute, Centre for Endocrinology, Queen Mary University of London, London, UK
aUniversity Pediatric Hospital, Screening and Functional Endocrine Diagnostics, Medical University Sofia, Sofia, Bulgaria; bDepartment of Medical Chemistry and Biochemistry, Medical University Sofia, Sofia, Bulgaria; cGenetic Medico-Diagnostic Laboratory Genica, Sofia, Bulgaria; dUniversity Pediatric Hospital, Clinic of Pediatric Endocrinology and Genetics, Medical University Sofia, Sofia, Bulgaria
aDepartment of Paediatrics and Child Health, University College Cork, Cork, Ireland; bDepartment of Clinical Biochemistry, Cork University Hospital, Cork, Ireland; cDepartment of Clinical Biochemistry, Kings College London, London, UK; dDepartment of Paediatrics and Child Health, Cork University Hospital, Cork, Ireland