Christopher K Haddock1
, Walker SC Poston1
, Sara A Pyle2
, Robert C Klesges3
, Mark W Vander Weg4
, Alan Peterson5
and Margaret Debon6 
1
School of Medicine, University of Missouri-Kansas City, 2411 Holmes Street, Room MC-M03, Kansas City, MO 64110, USA
2
Departments of Preventive Medicine and Family Medicine, Kansas City University of Medicine and Biosciences, 1750 Independence Avenue, Kansas City, MO 64106, USA
3
Department of Preventive Medicine, St. Jude's Hospital, 66 N. Pauline, Suite 633, Memphis, TN 38163, USA
4
Department of Internal Medicine, University of Iowa, 200 Hawkins Drive, Iowa City, IA 52241, USA
5
Department of Psychiatry, University of Texas Health Sciences Center, 3939 Medical Drive, San Antonio, TX 78229, USA
6
Health Sciences Center, University of Tennessee, 5050 Poplar Avenue, Suite 1800, Memphis, TN 38157, USA