RT Journal Article SR Electronic T1 Review: evidence does not support the effectiveness of over the counter preparations for acute cough JF Evidence Based Nursing JO Evid Based Nurs FD BMJ Publishing Group Ltd and RCN Publishing Company Ltd SP 78 OP 78 DO 10.1136/ebn.5.3.78 VO 5 IS 3 YR 2002 UL http://ebn.bmj.com/content/5/3/78.abstract AB