- Correspondence to
: Dr Sharon Cummins
Department of Family and Preventive Medicine, University of California, San Diego (UCSD), 9500 Gilman Drive, MC0905, La Jolla, CA 92093-0905, USA;
- Published in print 1 January 2014.
- Published online 10 December 2013.
- Published first 8 March 2013.
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