| Affiliation: | 1. Department of Obstetrics and Gynecology, Division of Maternal Fetal Medicine, Baylor College of Medicine, Houston, Texas, USA;2. Northern Ontario School of Medicine, Thunder Bay, Ontario, Canada Centre for Rural and Northern Health Research, Lakehead University, Thunder Bay, Ontario, Canada;3. Department of Obstetrics and Gynecology, Division of Maternal Fetal Medicine, University of Toronto, Toronto, Ontario, Canada;4. Social and Behavioral Research Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA |
