- Correspondence to Osami Kawarada, Department of Cardiovascular Medicine, Ikuwakai Memorial Hospital, 3-20-29 Tatsumikita, Ikunoku, Osaka city, Osaka, 544-0004, Japan;
- Received August 26, 2018
- Revised October 27, 2018
- Accepted November 11, 2018
- First published March 30, 2019.
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