1. Escuela de Medicina y Ciencias de la Salud Tecnológico de Monterrey Monterrey Mexico
2. Postgraduate Medical Education Harvard Medical School Boston Massachusetts USA
3. Countway Library of Medicine Harvard Medical School Boston Massachusetts USA
4. Department of Obstetrics and Gynecology Brigham & Women's Hospital, Harvard Medical School Boston Massachusetts USA
5. Department of Anesthesiology, Perioperative and Pain Medicine Brigham & Women's Hospital, Harvard Medical School Boston Massachusetts USA
6. Barcelona Center for Maternal‐Fetal and Neonatal Medicine (Hospital Clínic) IDIBAPS, University of Barcelona Barcelona Spain