- Correspondence to Dr Takayuki Nagai, Department of Cardiology, Pulmonology, Hypertension, and Nephrology, Ehime University Graduate School of Medicine, Toon, Ehime 791-0295, Japan;
- Received 1 August 2017
- Revised 10 October 2017
- Accepted 23 October 2017
- Published online 9 November 2017.
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