[1] Penn State College of Medicine,Division of General Internal Medicine, Department of Medicine
[2] Penn State College of Medicine,Department of Public Health Sciences
[3] School of Public Health,Division of Epidemiology and Community Health
[4] University of Minnesota,Department of Public Health Sciences
[5] HealthPartners Research Foundation,undefined
[6] Center for Nutrition and Activity Promotion,undefined
[7] Penn State College of Medicine,undefined