Reason for withdrawal from publication
The protocol is out of date and does not meet the current methological standards of Cochrane. Withdrawn by Cochrane Colorectal group, current no plans to revise/republish.
withdrawn
The editorial group responsible for this previously published document have withdrawn it from publication.
History
Protocol first published: Issue 12, 2011
Sources of support
Internal sources
None, Other
External sources
None, Other
Withdrawn from publication for reasons stated in the review