Mizher, Hussam, et al. “ADHERENCE TO OPIOID THERAPY IN PATIENTS WITH CHRONIC NON-CANCER PAIN ATTENDING A PAIN CLINIC IN MALAYSIA”. Asian Journal of Pharmaceutical and Clinical Research, vol. 11, no. 15, Oct. 2018, pp. 4-7, doi:10.22159/ajpcr.2018.v11s3.29960.