Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
6-11-1 Omorinishi, Ota-ku, Tokyo, Japan, 143-8541
E-mail: masaya.shinohara@med.toho-u.ac.jp
Conflict of interest statement: The authors have no conflicts to disclose.
Acknowledgments: We thank Mr. John Martin for a linguistic revision.
Funding Sources: This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
The total number of pages (words) for manuscript: 8 pages (1,727 words)
The total number of figures: 3