1. Wijayanti:
Department of Obstetrics and Gynecology, Faculty of Medicine,Universitas Airlangga, Surabaya,Indonesia
2. Eighty Mardiyan Kurniawati:
Department of Obstetrics and Gynecology, Faculty of Medicine,Universitas Airlangga, Surabaya,Indonesia
3. Widjiati:
Department of Veterinary Anatomy, Faculty of Veterinary Medicine,Universitas Airlangga, Surabaya,Indonesia
4. Budi Iman Santoso:
Department of Obstetrics and Gynecology, Faculty of Medicine, Universitas Indonesia - Dr. Cipto Mangunkusumo Hospital,Jakarta,Indonesia