1. Department of Psychiatry and Human Behavior; Alpert Medical School of Brown University/The Miriam Hospital Weight Control and Diabetes Research Center; Providence Rhode Island USA
2. Department of Epidemiology; Graduate School of Public Health; University of Pittsburgh; Pittsburgh Pennsylvania USA
3. Department of Surgery; Alpert Medical School of Brown University/The Miriam Hospital; Providence Rhode Island USA
4. Department of Surgery; Roger Williams Hospital; Providence Rhode Island USA
5. Department of Surgery; Cedars-Sinai Medicine; Los Angeles California USA.