PT - JOURNAL ARTICLE AU - Paul Swain TI - Techniques in therapeutic endoscopy AID - 10.1136/gut.30.6.891-a DP - 1989 Jun 01 TA - Gut PG - 891--892 VI - 30 IP - 6 4099 - http://gut.bmj.com/content/30/6/891.2.short 4100 - http://gut.bmj.com/content/30/6/891.2.full SO - Gut1989 Jun 01; 30