1. Rebecca C. Fitch, MPH; Lisa J. Harnack, DrPH; Dianne R. Neumark-Sztainer, PhD; Mary T. Story, PhD; Simone A. French, PhD; J. Michael Oakes, PhD; and Sarah A. Rydell, MPH, were all affiliated with the Division of Epidemiology and Community Health, University of Minnesota, Minneapolis, at the time of the study. Ms Fitch is now with the Infection Prevention and Control Unit at Mayo Clinic, Rochester, Minnesota