- Correspondence to Dr Muneko Nishijo, Department of Public Health, Kanazawa Medical University, 1-1, Daigaku, Uchinada, Ishikawa 920-0293, Japan;
- Received June 28, 2012
- Revised October 27, 2012
- Accepted December 13, 2012
- First published February 6, 2013.
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