1. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA.
2. Department of Family Medicine, Swedish First Hill, Seattle, Washington, USA.
3. Division of General Internal Medicine and Geriatrics, Department of Medicine and Medical Education, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA.
4. Division of General Internal Medicine and Geriatrics, Department of Medicine and Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA.
5. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, The Ohio State University College of Medicine, Columbus, Ohio, USA.