title: Hitting a moving target: the use of ethnographic methods in the development of sampling strategies for the evaluation of AIDS outreach programs for homeless youth in New York City.
authors.affiliation: Youth At Risk Project, National Development and Research Institutes, Inc., New York, NY 10013, USA.
authors.forename: M C
authors.initials: MC
authors.lastname: Clatts
authors.forename: W R
authors.initials: WR
authors.lastname: Davis
authors.forename: A
authors.initials: A
authors.lastname: Atillasoy
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000517:prevention & control* / Q000523:psychology; D000293:Adolescent; D000328:Adult; D003153:Community Health Services; D004812:Epidemiologic Methods; D006266:Health Education; D018453:Homeless Youth; D006801:Humans; D007407:Interviews as Topic; D009519:New York City; D015397:Program Evaluation; D012107:Research Design; D012494:Sampling Studies