1. Department of Obstetrics and Gynecology, Gynecologic Oncology Division and Woman's Health Centre, Chulabhorn Hospital, and HRH Princess Chulabhorn College of Medical Science, Chulabhorn Royal Academy, Bangkok, Thailand.
2. Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital at Linkou, Tao-Yuan, Kweishan, Taiwan.
3. Department of Obstetrics and Gynecology, Rajavithi Hospital, Bangkok, Thailand.
4. Chang Gung University College of Medicine, Tao-Yuan, Kweishan, Taiwan.