title: Need, demand, and external validity in dissemination of physical activity programs.
authors.affiliation: Keck School of Medicine, University of Southern California, Alhambra, California, USA. tvalente@usc.edu
authors.forename: Thomas W
authors.initials: TW
authors.lastname: Valente
mesh_terms: D003430:Cross-Sectional Studies; D004059:Diffusion of Innovation; D006293:Health Promotion / Q000639:trends*; D006301:Health Services Needs and Demand / Q000639:trends*; D006801:Humans; D033181:Information Dissemination; D009043:Motor Activity; D009765:Obesity / Q000453:epidemiology* / Q000517:prevention & control; D015203:Reproducibility of Results; D014481:United States