1. School of Medicine, Case Western Reserve University, Cleveland, OH, USA,
2. Department of Obstetrics and Gynecology, University of Zaragoza Faculty of Medicine and Lozano Blesa University Hospital, Domingo Miral s/n, Zaragoza, Spain,
3. Center for Public Health Research, Research Institute, Faculty of Medicine, University of San Martin de Porres, Lima, Peru,
4. School of Medicine, Universidad Peruana de Ciencias Aplicadas (UPC), Lima, Peru, and
5. Department of Quantitative Health Sciences, Health Outcomes and Clinical Epidemiology Section, Cleveland Clinic, Cleveland, OH, USA