The zinc for the common cold review by Singh and Das has a number of problems which should be considered when the review is next time updated : [Feedback on Cochrane review "Zinc for the common cold"]
Feedback to the following Cochrane review: Singh M & Das RR: Zinc for the common cold. Cochrane Database Syst Rev. 2011 Jan 18;1:CD008965 http://www.ncbi.nlm.nih.gov/pubmed/21328251Non peer reviewe
