Developing an evidence-based guide to community preventive services—methods11Some of this material has been previously published in: Shefer A, Briss P, Rodewald L, et al. Improving immunization coverage rates: An evidence-based review of the literature. Epidemiologic Reviews 1999;20:96–142.22The names and affiliations of the Task Force members are listed on page v of this supplement and at http://www.thecommunityguide.org