PT - JOURNAL ARTICLE AU - Yasutoshi Shiratori AU - Katsuyuki Fukuda TI - Collagenous colitis diagnosed by endoscopically induced mucosal tears AID - 10.1136/bcr-2019-230570 DP - 2019 May 17 TA - BMJ Case Reports PG - e230570 VI - 12 IP - 5 4099 - http://casereports.bmj.com/content/12/5/e230570.short 4100 - http://casereports.bmj.com/content/12/5/e230570.full SO - BMJ Case Reports2019 May 17; 12