1. Department of Obstetrics & Gynecology and Laboratory of Reproductive Biology; Universidad de Los Andes; Chile
2. Department of Maternal-Fetal Medicine, Clínica Davila; Santiago Chile
3. Clinic Institute of Gynecology, Obstetrics and Neonatology (ICGON), Hospital Clinic, and Fetal and Perinatal Medicine Group, Institutd' Investigacions Biomediques Augus Pii Sunyer (IDIBAPS); Universidad de Barcelona; Spain