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Posted by plosmedicine on 31 Mar 2009 at 00:32 GMT

Author: Darcy Gill
Position: Publications Assistant
Institution: PLoS Medicine
Submitted Date: November 24, 2008
Published Date: November 24, 2008
This comment was originally posted as a “Reader Response” on the publication date indicated above. All Reader Responses are now available as comments.

Since this paper was accepted for publication, the author has provided a more up-to-date version of the Interview Guide (page 4 of Text S1). A formal correction containing this updated document will be published soon.

No competing interests declared.