1. Department of Obstetrics and Gynecology; Cathay General Hospital; Taipei Taiwan
2. Department of Obstetrics and Gynecology; School of Medicine, College of Medicine, Taipei Medical University; Taipei Taiwan
3. Graduate Institute of Clinical Medicine, College of Medicine; National Taiwan University; Taipei Taiwan
4. School of Nutrition and Health Sciences, College of Public Health and Nutrition; Taipei Medical University; Taipei Taiwan
5. Department of Obstetrics and Gynecology, Shuang Ho Hospital; Taipei Medical University; Taipei Taiwan