PT - JOURNAL ARTICLE AU - L D SHARPLES AU - N CAINE AU - P M SCHOFIELD AU - L M SHAPIRO AU - J DUNNING AU - J WALLWORK TI - Randomised trials of new surgical procedures are necessary AID - 10.1136/hrt.81.1.100 DP - 1999 Jan 01 TA - Heart PG - 100--101 VI - 81 IP - 1 4099 - http://heart.bmj.com/content/81/1/100.short 4100 - http://heart.bmj.com/content/81/1/100.full SO - Heart1999 Jan 01; 81