1. Faculty of Health Sciences, Universidad Industrial de Santander, Bucaramanga, Colombia
2. Department of Obstetrics and Gynecology, Maternal-Fetal Medicine Unit, Universidad Industrial de Santander, Bucaramanga, Colombia
3. Department of Pathology, Universidad Industrial de Santander, Bucaramanga, Colombia
4. Department of Obstetrics and Gynecology, Division of Obstetrics and Gynecological Ultrasound, New York University School of Medicine, New York City, NY, USA