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Lafferty WE, Kimball AM, Bolan G, Handsfield HH.Lafferty WE, et al.J Public Health Manag Pract. 1998 Jan;4(1):52-8. doi: 10.1097/00124784-199801000-00010.J Public Health Manag Pract. 1998.PMID: 10183198