Publication info: Cochrane Database Syst Rev. 2010 Nov 10; (11):CD006590.PMID: 21069689External link: http://www.ncbi.nlm.nih.gov/pubmed/21069689Publication date: November, 2010Authors: Hegarty J, Beirne PV, Walsh E, Comber H, Fitzgerald T, Wallace Kazer MPublication type: Paper