- Correspondence to Professor Man-Fung Yuen, Department of Medicine, The University of Hong Kong, Hong Kong; and Professor Kwang-Hyub Han, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea;
- Received April 22, 2013
- Revised August 5, 2013
- Accepted August 6, 2013
- First published August 26, 2013.
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