title: Introduction to the special issues on longitudinal research on substance abuse and health services: current knowledge and future directions.
authors.affiliation: University of California, Los Angeles, USA.
authors.forename: Yih-Ing
authors.initials: YI
authors.lastname: Hser
authors.forename: Cheryl
authors.initials: C
authors.lastname: Teruya
mesh_terms: D007722:Health Knowledge, Attitudes, Practice; D006302:Health Services Research; D006801:Humans; D011446:Prospective Studies; D019966:Substance-Related Disorders