1 Department of Obstetrics and Gynecology, Kaohsiung Chang Gung Memorial Hospital and, Chang Gung University College of Medicine, Kaohsiung, Taiwan.
2 Department of Obstetrics and Gynecology, Jen-Ai Hospital, Taizhong, Taiwan.
3 Department of Medical Research, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, 12th Floor, Children's Hospital, No.123, Dapi Rd, Niaosong District, Kaohsiung, 83301, Taiwan. alangfan@gmail.com.
4 Department of Medical Education and Research, Kaohsiung Veterans General Hospital, 4th Floor, No.386, Dazhong 1st Rd, Zuoying District, Kaohsiung, 813414, Taiwan. raymond.pinus@gmail.com.