Changed contact details Andy P Dickens, University of Birmingham 22 October 2012 Please note that since publishing this paper I moved to the University of Birmingham and my email address is now: a.p.dickens@bham.ac.uk Competing interests None declared
Changed contact details
22 October 2012
Please note that since publishing this paper I moved to the University of Birmingham and my email address is now: a.p.dickens@bham.ac.uk
Competing interests
None declared