Medical cannabis or cannabinoids for chronic non-cancer and cancer related pain: a systematic review and meta-analysis of randomised clinical trials
Li Wang, P. Hong, Curtis May, Y. Rehman, Yvgeniy Oparin, Chris J Hong, B. Hong, M. AminiLari, L. Gallo, Alka Kaushal, S. Craigie, R. Couban, E. Kum, H. Shanthanna, Ira M Price, S. Upadhye, M. Ware, F. Campbell, R. Buchbinder, T. Agoritsas, J. Busse
British medical journal