'homeless person'/exp or (Diagnos* or homeless* or Race* or socioeconomic or disparit* or gender* or sex-factor*):ti,ab,kw,de or ill-housed:ti,ab,kw,de OR shelterless-person*:ti,ab OR street-people:ti,ab OR unhoused:ti,ab OR vagabond:ti,ab OR vagrant-people:ti,ab OR ‘drug dependence’/de or drug-seeking:ti,ab,kw,de or (Substance-Use-Disorder* or substance-Related-Disorder* or Drug-Use-Disorder* or Substance-Abuse* or Substance-Dependence* or Substance-Addiction or Chemical-Dependence* or Drug-Dependence* or Drug-Addiction or Prescription-Drug-Abuse or Substance-Use or Substance-Uses or Drug-Abuse or Drug-Habituation):ti,ab,kw,de or 'drug seeking behavior'/exp OR 'narcotic dependence'/exp OR ‘drug misuse’/exp