Updated author affiliations Roger Worthington, Yale University 5 November 2013 The address for correspondence has changed. RPW is no longer at Keele. He is an adjunct at Yale University (Department of General Internal Medicine) and works as an independent researcher and policy advisor. Competing interests None declared
Updated author affiliations
5 November 2013
The address for correspondence has changed. RPW is no longer at Keele. He is an adjunct at Yale University (Department of General Internal Medicine) and works as an independent researcher and policy advisor.
Competing interests
None declared