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The Chinese version of obsessive compulsive drug use scale: validation in outpatient methadone maintenance treatment program. 

Gong H, Zhang Y, Ren Q, Zhou Z, Zhou H, Sun X, Zhang C, Voon V, Zhao M, Yu S. 

BMC Psychiatry. 2020 Sep 25;20(1):465. doi: 10.1186/s12888-020-02843-2. PMID: 32977774; PMCID: PMC7517618.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7517618/