1. Medical study program, Faculty of Medicine, Universitas Airlangga, Surabaya, Indonesia
2. Departemen Obstetri dan Ginekologi, Dr. Soetomo General Academic Hospital, Universitas Airlangga, Surabaya, Indonesia
3. Departemen Anatomi dan Histologi, Faculty of Medicine, Universitas Airlangga, Surabaya, Indonesia