1 Department of Obstetrics and Gynecology, Oregon Health & Science University, 3181 SW Sam Jackson Pkwy, Portland, OR 97239; FUNDARED-MATERNA, Bogotá, Colombia. Electronic address: [email protected].
2 Department of Obstetrics and Gynecology, Oregon Health & Science University, Portland, OR; FUNDARED-MATERNA, Bogotá, Colombia; Department of Obstetrics & Gynecology, St. Luke's University Health Network, Bethlehem, PA.