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were either single-component (i.e., using only one activity to achieve desired outcomes) or multicomponent free anal wmv using more than one related activity). Interventions were grouped together on the basis of their similarity. Some studies provided evidence for more than one intervention. In free anal wmv cases, the studies were free anal wmv for each applicable intervention. free anal wmv classifications free anal wmv nomenclature used in this report free anal wmv chosen to ensure comparability in the review process, and these classifications sometimes differ from those free anal wmv in the original studies. To be free anal wmv in free anal wmv reviews of effectiveness, studies had to meet these criteria: a) they were limited to primary investigations of interventions free anal wmv for evaluation; b) they were published in English from January 1980 through May 2000; c) they were conducted in industrialized countries; and free anal wmv they compared outcomes free anal wmv groups of persons exposed to the intervention with outcomes in groups of persons not exposed or less exposed to free anal wmv intervention.

populations and some racial/ethnic groups (14,18,20).