1. Division of Gynecological Endocrinology and Reproductive Medicine, Wome’s Hospital, Lucerne Cantonal Hospital, Lucerne, Switzerland.
2. Division of Gynecological Endocrinology and Reproductive Medicine, University Womeńs Hospital, Inselspital Bern, University of Bern, Bern, Switzerland.
3. Medical Library, University Library Bern, University of Bern, Bern, Switzerland.
4. Department of Medical Oncology, Inselspital Bern, University of Bern, Bern, Switzerland.