Reason for withdrawal from publication
This protocol for a Cochrane Review is out of date. Auhors have abandoned it.
withdrawn
The editorial group responsible for this previously published document have withdrawn it from publication.
History
Protocol first published: Issue 3, 2011
Sources of support
Internal sources
Cochrane Hepato‐Biliary Group, Denmark
External sources
No sources of support provided
Withdrawn from publication for reasons stated in the review
