Received: 17 March 2021
Accepted: 26 May 2021
First Online: 7 June 2021
: This study was performed in line with the principles of the Declaration of Helsinki (1964) and its subsequent amendments and was approved by the institutional review board of Osaka Medical College hospital (approval number-1912). Informed consent was obtained from all individual participants included in the study.
: Not applicable.
: The authors declare that they have no conflicts of interest.