Received: 11 October 2019
Accepted: 14 July 2020
First Online: 23 July 2020
Ethics approval and consent to participate
: The study protocol was approved by the Institutional Review Board of Chiyoda Paramedical Care Clinic and the Meiji Institutional Review Board. The study was conducted in accordance with the Declaration of Helsinki.
: Not applicable.
: YT, RM, and MY are employees of Meiji Co., Ltd.