1. Division of Reproduction Genetics, Department of Gynaecological Endocrinology & Infertility Disorders, Women Hospital, University of Heidelberg, Heidelberg, Germany
2. Novum, Center for Reproductive Medicine, Essen, Germany
3. Division of Paediatric Endocrinology and Diabetes, Children Hospital, University of Heidelberg, Heidelberg, Germany
4. Department of Gynaecological Endocrinology & Infertility Disorders, Women Hospital, University of Heidelberg, Heidelberg, Germany
5. Division of Gynaecopathology, Department of Pathology, University Hospital Heidelberg, Heidelberg, Germany
6. Children Hospital; University of Erlangen, Erlangen, Germany
7. Children Hospital Augsburg I, Academic Hospital of University of Munich, Augsburg, Germany
8. Department of Medicine, VA Medical Center 111C5, University of California, San Francisco, USA