title: Co-morbidity is the norm, not the exception: chronic respiratory diseases in chronic drug users.
authors.forename: Theresa W
authors.initials: TW
authors.lastname: Kim
authors.forename: Jeffrey H
authors.initials: JH
authors.lastname: Samet
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D012140:Respiratory Tract Diseases / Q000150:complications*; D019966:Substance-Related Disorders / Q000150:complications*