1. Department of Obstetrics and Gynecology; Kayseri Military Hospital; Kayseri Turkey
2. Department of Obstetrics and Gynecology; Kayseri Memorial Hospital; Kayseri Turkey
3. Department of Obstetrics and Gynecology; Kayseri Acıbadem Hospital; Kayseri Turkey
4. Department of Public Health and Epidemiology; Gülhane Military Faculty of Medicine; Ankara Turkey