Kono, Keiji
Fujii, Hideki
Watanabe, Kentaro
Goto, Shunsuke
Nishi, Shinichi
Article History
Received: 9 June 2020
Accepted: 5 August 2020
First Online: 12 September 2020
Compliance with ethical standards
:
: All authors have no conflicts of interest.
: This study was approved by the institutional medical ethical committee (No. 180016). The study was conducted in line with the 1964 Helsinki Declaration principles.