1. Department of Gynecology and Obstetrics, Faculty of Medicine, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil
2. Bayer Consumer Care AG, Basel, Switzerland
3. Bayer AG, Berlin, Germany
4. Department of Medical and Surgical Sciences for Mother, Child and Adult, University of Modena and Reggio Emilia, Azienda Ospedaliero-Universitaria Policlinico, Modena, Italy