Affiliation: | 1. Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital at Linkou and Chang Gung University College of Medicine, (Drs. You, Chueh, Huang, Wang, and Yen);2. Department of Emergency Medicine, Chang Gung Memorial Hospital at Keelung (Dr. Chen);3. Graduate Institute of Clinical Medical Sciences, Chang Gung University College of Medicine, (Dr. Wang), Tao-Yuan, Taiwan. |