PT - JOURNAL ARTICLE AU - D. Portnoy AU - A. Soneji AU - D. Murray AU - G. K. Richards TI - Pseudomembranous colitis: multiple relapses after treatment with metronidazole DP - 1981 Jun 15 TA - Canadian Medical Association Journal PG - 1603--1605 VI - 124 IP - 12 4099 - http://www.cmaj.ca/content/124/12/1603.short 4100 - http://www.cmaj.ca/content/124/12/1603.full SO - CMAJ1981 Jun 15; 124