- Correspondence to Dr Sam D Leary, Lifecourse Epidemiology and Population Oral Health Research Group, School of Oral and Dental Sciences, University of Bristol, Lower Maudlin Street, Bristol BS1 2LY, UK;
- Received July 26, 2012
- Revised November 22, 2012
- Accepted November 26, 2012
- First published January 15, 2013.
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