title: Nagging doubt, public opinion offer obstacles to ending 'cluster' studies.
authors.forename: C
authors.initials: C
authors.lastname: Raymond
mesh_terms: D002487:Centers for Disease Control and Prevention, U.S.; D004196:Disease Outbreaks; D006801:Humans; D011639:Public Opinion; D012106:Research; D013029:Space-Time Clustering; D014481:United States