1. Monash Centre for Health Research and Implementation, School of Public Health and Preventive Medicine, Monash University , Clayton, Victoria 3168 , Australia
2. Department of Obstetrics and Gynecology, University of Helsinki, Helsinki University Hospital , 00014 Helsinki , Finland
3. Department of Obstetrics and Gynecology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg , 40530 Gothenburg , Sweden
4. Department of Obstetrics and Gynecology, Research Unit of Clinical Medicine and Medical Research Centre Oulu, Oulu University Hospital, University of Oulu , 90014 Oulu , Finland
5. Department of Woman and Child Health and Public Health, Fondazione Policlinico Universitario Agostino Gemelli, IRCCS , 00168 Rome , Italy
6. Gynecological Endocrinology Unit, Division of Endocrinology, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul , Porto Alegre, RS 90035-003 , Brazil
7. Discipline of Paediatrics, The University of Adelaide and Robinson Research Institute , Adelaide, South Australia 5005 , Australia
8. Division of Pediatric Endocrinology, Department of Pediatrics, UPMC Children's Hospital of Pittsburgh , Pittsburgh, PA 15224 , USA
9. Endocrine and Diabetes Units, Monash Health , Clayton, Victoria 3169 , Australia