PT - JOURNAL ARTICLE ED - BMJ Publishing Group Ltd TI - Warfarin was cost-effective for stroke prophylaxis in nonvalvular atrial fibrillation with additional risk factors AID - 10.1136/ebm.1996.1.128 DP - 1996 Jun 01 TA - Evidence Based Medicine PG - 128--128 VI - 1 IP - 4 4099 - http://ebm.bmj.com/content/1/4/128.short 4100 - http://ebm.bmj.com/content/1/4/128.full SO - Evid Based Med1996 Jun 01; 1