title: A few apologies, but no regrets.
authors.affiliation: Veterans Affairs and Stanford University Medical Centers, Menlo Park, CA 94025, USA. knh@stanford.edu
authors.forename: Keith
authors.initials: K
authors.lastname: Humphreys
mesh_terms: D035843:Biomedical Research; D002321:Career Choice; D006801:Humans; D019966:Substance-Related Disorders