PT - JOURNAL ARTICLE AU - Anthony Richard Cox AU - Robin Ferner TI - Tramadol: repeated prescriptions and repeated warnings AID - 10.1136/bmjebm-2020-111661 DP - 2021 Dec 01 TA - BMJ Evidence-Based Medicine PG - e17--e17 VI - 26 IP - 6 4099 - http://ebm.bmj.com/content/26/6/e17.short 4100 - http://ebm.bmj.com/content/26/6/e17.full SO - BMJ EBM2021 Dec 01; 26