The San Francisco experience.
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D000163:Acquired Immunodeficiency Syndrome / Q000191:economics / Q000517:prevention & control* / Q000523:psychology; D004739:England / Q000208:ethnology; D006801:Humans; D007393:International Educational Exchange; D012495:San Francisco; D012944:Social Support; D014837:Voluntary Health Agencies / Q000191:economics / Q000458:organization & administration*