Program prototypes: programs in Philadelphia.
D000293:Adolescent; D003226:Congresses as Topic; D004345:Drug Industry; D005381:Financing, Organized; D006266:Health Education; D006801:Humans; D007255:Information Services; D009524:Newspapers as Topic; D010379:Peer Group; D010414:Pennsylvania; D011845:Radio; D012572:School Health Services; D012749:Sexually Transmitted Diseases / Q000517:prevention & control*; D013689:Telephone; D013690:Television