1. Department of Obstetrics and Gynecology, Division of Maternal Fetal Medicine, Baylor College of Medicine, Houston, TX, USA
2. University of Texas Health Sciences Center at San Antonio, San Antonio, TX, USA
3. Department of Obstetrics & Gynecology, University Health System, San Antonio, TX, USA
4. Department of Pediatrics, University of Texas Health Science Center-San Antonio, San Antonio, TX, USA
5. Department of Anesthesiology, University Health System, San Antonio, TX, USA