- Correspondence to Dr Mitsuo Hashimoto, Division of Respiratory Diseases, Department of Internal Medicine, The Jikei University School of Medicine, Nishi-Shinbashi, Minato-ku, Tokyo 105-8461, Japan ;
- Received July 31, 2017
- Revised October 23, 2017
- Accepted October 25, 2017
- First published November 9, 2017.
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