Received: 6 April 2020
Accepted: 22 September 2020
First Online: 6 October 2020
Ethics approval and consent to participate
: The study involving human participants was approved by the institutional review board of Showa University Ethics Committee (No. 2943). All the participants were informed and written consent was obtained. The methods were carried out in accordance with the approved guidelines. All clinical research was performed on the basis of the principles expressed in the Declaration of Helsinki.
: Not applicable.
: The authors Takeshi Aoki, Doaa A. Mansour, Tomotake Koizumi, Kazuhiro Matsuda, Tomokazu Kusano, Yusuke Wada, Tomoki Hakozaki, Kodai Tomioka, Takahito Hirai, Tatsuya Yamazaki, Makoto Watanabe, Koji Otsuka, Ahmed Elewa Abbas Gahin and Masahiko Murakami declare that they have no conflict of interest financial or otherwise to disclose.