- Correspondence to Dr M Constanza Camargo, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, 6120 Executive Blvd, EPS 6116, Rockville, MD 20852, USA;
- Received January 17, 2013
- Revised March 9, 2013
- Accepted March 19, 2013
- First published April 11, 2013.
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