Affiliation: | 1. Department of Biology, école Normale Supérieure de Lyon, Lyon, France 2. Nordwest Hospital, Frankfurt am Main, Germany 3. Department of Gynecology and Obstetrics, Philipps-Universit?t Marburg, Marburg, Germany 4. Epidemiology, IMS HEALTH GmbH & Co. OHG, Darmst?dter Landstra?e 108, 60598, Frankfurt am Main, Germany
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