TY - JOUR T1 - <em>Clostridium difficile</em> infection in hospitals: risk factors and responses JF - Canadian Medical Association Journal JO - CMAJ SP - 45 LP - 46 DO - 10.1503/cmaj.1040966 VL - 171 IS - 1 AU - Thomas J. Louie AU - Jon Meddings Y1 - 2004/07/06 UR - http://www.cmaj.ca/content/171/1/45.abstract ER -