[1
]
From the aDepartment of Environmental Health Sciences, bDepartment of Biostatistics,
Johns Hopkins Bloomberg School of Public Health, Baltimore, MD; cDepartment of Medicine,
Johns Hopkins School of Medicine, Baltimore, MD; dDepartment of Epidemiology, Brown
University School of Public Health, Providence, RI; eDepartment of Obstetrics and
Gynecology, Alpert School of Medicine, Brown University, Providence, RI; fRobert Wood
Johnson Foundation Health and Society Scholars Program, UC San Francisco and UC Berkeley,
San Franciso, CA; and gCenter for Health Research, Geisinger Health System, Danville,
PA.