- Correspondence to Dr Mei-Shu Lai, Graduate Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, 17, Xuzhou Road, Taipei City 10055, Taiwan; Dr Chia-Hsuin Chang, Department of Internal Medicine, National Taiwan University Hospital, 7, Chung-Shan South Road, Taipei, 10002, Taiwan;
- Received March 18, 2012
- Accepted July 29, 2012
- First published October 6, 2012.
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