Article History
Received: 1 December 2020
Accepted: 4 February 2021
First Online: 17 February 2021
Compliance with ethical standard
:
: The authors declare that they have no conflict of interest.
: All procedures followed were in accordance with the Helsinki Declaration of 1964 and later versions. The study protocol was approved by the Ethics Committees of Soka Municipal Hospital (approval no: 2020–06, approval date: 23 June 2020) and Meiji Pharmaceutical University (approval no: 202010, approval date: 6 July 2020).
: Due to the retrospective observational design, written informed consent was not obtained from the participants, although it was obtained via the opt-out method through the website of the institution.