Nogi, Maki
Okura, Hiroyuki
Kataoka, Toru
Yoshida, Kiyoshi
Article History
Received: 31 July 2019
Revised: 2 October 2019
Accepted: 28 October 2019
First Online: 6 November 2019
Compliance with ethical standards
:
: Maki Nogi, Hiroyuki Okura, Toru Kataoka and Kiyoshi Yoshida declare that they have no conflict of interest.
: All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and later revisions. Informed consent for echocardiographic examination was obtained from all patients. As described in the methods section, informed consent for being included in this specific study was not obtained because the ethical committee of the institution (Bell Land General Hospital) did not require either approval by the committee or informed consent from the patients for this retrospective observational analysis.