1. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Faculty of Medicine Siriraj Hospital; Mahidol University; Bangkok Thailand
2. Department of Obstetrics and Gynecology; Nopparat Rajathanee Hospital; Bangkok Thailand
3. Division of Pediatric Cardiology, Department of Pediatrics; David Geffen School of Medicine at UCLA; Los Angeles CA USA