RT Journal Article SR Electronic T1 Review: probiotics are effective in preventing antibiotic-associated diarrhoea JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 184 OP 184 DO 10.1136/ebm.7.6.184 VO 7 IS 6 YR 2002 UL http://ebm.bmj.com/content/7/6/184.abstract AB