Received: 8 February 2021
Accepted: 20 April 2021
First Online: 3 May 2021
: The study was carried out according to The Declaration of Helsinki and approved by the ethical committee of The University of Tokyo Hospital (ID: 2020039NI), the ethical committee of Mitsui Memorial hospital (ID: 2020C30), and the committee of Chiba Tokushukai Hospital (ID: 184). Written informed consent was obtained from each patient.
: Not applicable.
: The authors declare that they have no competing interests.