“…3 We searched the PubMed, PsycINFO and PsycARTICLES databases for publications on CAN using the following terms: addiction, drug dependence, heroin AND methadone; the search yielded only four studies, conducted primarily in mental healthcare systems. [4][5][6][7] Nevertheless, surveys using non-standardised assessments have found high levels of unmet needs, particularly legal, basic, financial, family, social services, medical and mental healthcare, in addiction patient groups.…”