title: Experiences, problems and perspectives re data collection on drug abusers.
mesh_terms: D003376:Counseling; D006077:Government Agencies; D006213:Hallucinogens; D006801:Humans; D007256:Information Systems; D008396:Maryland; D009294:Narcotics; D012106:Research; D012108:Research Personnel; D019966:Substance-Related Disorders
chemical_list: D006213:Hallucinogens; D009294:Narcotics