Abstract

Reason for withdrawal from publication

At April 2020, this review has been withdrawn. It is correct at the date of publication, and previous versions can be accessed in the ‘Other versions’ tab on the Cochrane Library. We are aware of new studies to potentially change the conclusions, however the update did not meet the timelines and expectations of Cochrane and the PaPaS review group.

The editorial group responsible for this previously published document have withdrawn it from publication.

Author(s)

Shona Osborn, Allan M Cyna, Philippa Middleton, James D Griffiths

Reviewer's Conclusions

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