RT Journal Article SR Electronic T1 A probiotic drink prevented diarrhoea and Clostridium difficile infection in older patients taking antibiotics JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 46 OP 46 DO 10.1136/ebm.13.2.46 VO 13 IS 2 YR 2008 UL http://ebm.bmj.com/content/13/2/46.abstract AB