title: The design of action research experimental campaigns.
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006069:Gonorrhea / Q000517:prevention & control; D006266:Health Education; D006801:Humans; D008131:London; D008297:Male; D011406:Propaganda; D012106:Research; D012749:Sexually Transmitted Diseases / Q000517:prevention & control*