- Correspondence to Barbara France, North Wales Centre for Primary Care Research, Bangor University, Gwenfro Building Units 5-7, Wrexham Technology Park, Wrexham LL13 7YP, UK;
- Received April 18, 2013
- Revision received August 7, 2013
- Accepted August 16, 2013
- First published September 18, 2013.
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