Gay students paid for prevention.
D015492:AIDS Serodiagnosis / Q000191:economics / Q000706:statistics & numerical data*; D002681:China; D015658:HIV Infections / Q000175:diagnosis* / Q000517:prevention & control; D007722:Health Knowledge, Attitudes, Practice; D018451:Homosexuality, Male; D006801:Humans; D008297:Male; D013334:Students / Q000523:psychology; D014495:Universities