- Correspondence to Dr Takeshi Aiba, Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, 5-7-1 Fujishiro-dai, Suita, Osaka 565-8565, Japan;
- Received 15 September 2016
- Revised 8 February 2017
- Accepted 22 February 2017
- Published online 14 March 2017.
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