[1] Univ Michigan, Sch Med, Ann Arbor, MI 48109 USA
[2] Ctr Dis Control & Prevent, CDC Experience Appl Epidemiol Fellowship, Sci Educ & Profess Dev Program Off, Atlanta, GA 30341 USA
[3] Natl Ctr Chron Dis Prevent & Hlth Promot, Div Nutr Phys Act, Obes, 4770 Buford Hwy NE,MSK 26, Atlanta, GA 30341 USA
[4] Ctr Dis Control & Prevent, Atlanta, GA 30341 USA