title: Subject recruitment and retention issues in longitudinal research involving substance-abusing families: a clinical services context.
authors.affiliation: Department of Pediatrics, University of California, Los Angeles School of Medicine 90024-1797.
authors.forename: J
authors.initials: J
authors.lastname: Howard
mesh_terms: D005190:Family; D006801:Humans; D012107:Research Design; D019966:Substance-Related Disorders / Q000523:psychology / Q000628:therapy*