- Correspondence to Dr Hiromichi Hara, Division of Respiratory Diseases, Department of Internal Medicine, Jikei University School of Medicine, 3-19-18 Nishishimbashi, Minatoku, Tokyo 105-8471, Japan;
- Received October 19, 2016
- Revised November 11, 2016
- Accepted November 12, 2016
- First published December 2, 2016.
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