- Correspondence to Dr Parveen Bhatti, Program in Epidemiology, Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, P.O. Box 19024 M4-B874, Seattle, WA 98109, USA;
- Received August 28, 2012
- Revised November 15, 2012
- Accepted December 8, 2012
- First published January 23, 2013.
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