[1] The Johns Hopkins University School of Medicine,the Department of Medicine
[2] and Welch Center for Prevention,Department of Epidemiology
[3] Epidemiology and Clinical Research,Department of Health Policy and Management
[4] the Johns Hopkins University School of Hygiene and Public Health,Center for Behavioral and Preventive Medicine
[5] the Johns Hopkins University School of Hygiene and Public Health,undefined
[6] St. Joseph Medical Center,undefined
[7] Maryland General Hospital,undefined
[8] The Miriam Hospital,undefined