- Correspondence to Dr Cari M Kitahara, Radiation Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, 9609 Medical Center Drive, Rockville, MD 20850, USA;
- Received January 21, 2015
- Revised June 18, 2015
- Accepted July 14, 2015
- First published July 28, 2015.
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