1. Department of Obstetrics and Gynecology and Center for Gynecological Endocrinology and Reproductive Medicine, University Hospital, Ludwig-Maximilians University, Munich,
Germany
2. TFP Fertility Wels, Wels, Austria
3. Practice for Obstetrics and Gynecology, Erfurt, Germany
4. Centre for Reproductive Medicine, Munich, Germany
5. Division of Endocrinology and Metabolism, Georgetown University Medical Center, Washington, D.C., USA
6. Department of Clinical Chemistry, University Hospital, Ludwig-Maximilians University, Munich, Germany