[1] Duke University Diet and Fitness Center,Department of Medicine
[2] Duke University School of Medicine,Department of Veterans Affairs
[3] Center for Health Services Research in Primary Care,Department of Biostatistics, Epidemiology and Informatics, Perelman School of Medicine
[4] University of Pennsylvania,Leonard Davis Institute Center for Health Incentives and Behavioral Economics, Perelman School of Medicine
[5] University of Pennsylvania,Department of Health Care Management, The Wharton School
[6] University of Pennsylvania,Center for Clinical Epidemiology and Biostatistics, Perelman School of Medicine
[7] University of Pennsylvania,Department of Medical Ethics and Health Policy, Perelman School of Medicine
[8] University of Pennsylvania,Department of Medicine, Perelman School of Medicine
[9] University of Pennsylvania,Department of Population Health
[10] New York University School of Medicine,Department of Economics
[11] University of Pittsburgh,Department of Science and Innovation
[12] Weight Watchers International,Center for Obesity Research and Education
[13] Temple University,Center for Weight and Eating Disorders
[14] University of Pennsylvania,Center for Health Equity Research and Promotion
[15] Philadelphia Veterans Affairs Medical Center,undefined