This date is entered by review authors (for reviews only, not protocols). ‘Search’ here refers to the searches of all the databases searched for the review. If different databases were searched on different dates, the most recent date of the search for each database should be given within the text of the review and the earliest of the dates should be put in this field. For example, if the most recent searches of the following databases were on the following dates (MEDLINE 5 June 2007, EMBASE 12 June 2007, CRG’s Specialized Register 26 June 2007 and CENTRAL 28 June 2007) the ‘Date of search’ would be 5 June 2007.