| Number of abstracts | ||||
---|---|---|---|---|---|
Original search | First update | Second update | Third update | Fourth update | |
1800 – April 3 2009 | April 3 2009 – July 2010 | July 2010 – December 31 2010 | January 1 2011 – December 31 2011 | January 1 2012 – July 30 2013 | |
Database | |||||
CENTRAL | Â | 69 | 39 | 24 | 4 |
PsycInfo | Â | 574 | 424 | 426 | 31 |
PubMed | Â | 606 | 95 | 278 | 687 |
TOTAL | 8986 | 1249 | 558 | 728 | 722 |