1. Department of Pediatrics, College of Medicine, The Catholic University of Korea, Seoul, Korea.
2. Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, Seoul, Korea.
3. Department of Bioanalytical Mass Spectrometry, Sunin Bio Corporation, Seoul, Korea.
4. Department of Obstetrics and Gynecology, Cheil General Hospital and Women's Healthcare Centre, Dankook University College of Medicine, Seoul, Korea.
5. Department of Preventive Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea.
6. Department of Psychiatry, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.