RT Journal Article SR Electronic T1 Co-amoxiclav had short-term effectiveness for persistent otitis media with effusion in young children JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 41 OP 41 DO 10.1136/ebm.1997.2.41 VO 2 IS 2 YR 1997 UL http://ebm.bmj.com/content/2/2/41.abstract AB