1. Department of Medicine, Division of Primary Care and Population Health, Stanford University School of Medicine, Stanford, California, USA.
2. Program in Human Biology, Stanford University, Stanford, California, USA.
3. Geisel School of Medicine, Dartmouth College, Hanover, New Hampshire, USA.
4. University of Southern California Roski Eye Institute, Los Angeles, California, USA.
5. Defense Health Agency, Falls Church, Virginia, USA.
6. Department of Obstetrics and Gynecology, Stanford University School of Medicine, Stanford, California, USA.