Received: 7 August 2020
Accepted: 14 October 2020
First Online: 1 December 2020
Ethics approval and consent to participate
: This study was conducted in accordance with the World Medical Association Declaration of Helsinki and was approved by the institutional review board of The Jikei University (Approval number: 29–043(8659)).
: Informed consent was obtained from each patient.
: The authors declare that they have no competing interests.