title: Retention in therapeutic communities: challenges for the nineties.
authors: School of Public Health, University of Massachusetts at Amherst 01003, USA.
authors: B F
authors: BF
authors: Lewis
authors: R
authors: R
authors: Ross
mesh_terms: D006801:Humans; D007902:Length of Stay / Q000639:trends*; D010352:Patient Dropouts; D019966:Substance-Related Disorders / Q000534:rehabilitation*; D013808:Therapeutic Community