- Correspondence to Professor Jung Pyo Lee, Department of Internal Medicine, Seoul National University Boramae Medical Center, 20 Boramae-ro 5-gil, Dongjak-gu, Seoul 156-707, Republic of Korea;
- Received May 13, 2015
- Revised August 28, 2015
- Accepted September 1, 2015
- First published September 28, 2015.
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