Source	Date Searched	Hits Retrieved
MEDLINE (Pubmed)	Searched 7 September 2009	68
Embase (Ovid SP)	Searched 7 September 2009	34
PSYCINFO (Ovid SP)	Searched 7 September 2009	7
CINAHL (Ovid SP)	Searched 7 September 2009	11
Lilacs (Bireme)	Searched 7 September 2009	0
CDCIG SR	Searched 7 September 2009	71
CENTRAL (The Cochrane Library)	Issue 4 2009	34
ISTP Conference Proceedings http://portal.isiknowledge.com/portal.cgi	Searched 7 September 2009	4
Australian Digital Theses Program http://adt.caul.edu.au/	Searched 7 September 2009	0
Canadian Theses and Dissertations http://www.collectionscanada.ca/thesescanada/index-e.html	Searched 7 September 2009	2
DATAD http://www.aau.org/datad/backgrd.htm	Searched 7 September 2009	0
WHO trials register http://www.who.int/ictrp/search/en/	Searched 7 September 2009	9
Current Controlled trials: Meta Register of Controlled trials (mRCT) http://www.controlled-trials.com/	Searched 7 September 2009	6
ISRCTN Register	Searched 7 September 2009 together with mRCT	0
Nederlands Trial Register http://www.trialregister.nl/trialreg/index.asp	Searched 7 September 2009	1
ClinicalTrials.gov http://www.ClinicalTrials.gov	Searched 7 September 2009 with mRCT	0
IPFMA Clinical Trials Register www.ifpma.org/clinicaltrials.html	Searched 7 September 2009	0
UMIN Japan Trial Register http://www.umin.ac.jp/ctr/	Searched 7 September 2009	0
ISI Web of Knowledge	Searched 7 September 2009	49
TOTAL before de‐duplication		Sept 2009: 296
TOTAL after de‐duplication		Sept 2009: 160
TOTAL after first assessment		Sept 2009: 27