Received: 2 August 2020
Accepted: 4 February 2021
First Online: 17 February 2021
Ethics approval and consent to participate
: This study was conducted in accordance with the Declaration of Helsinki (as revised in Brazil in 2013), and approval was obtained from the Ethical Committee of the Oita Oka Hospital (approval number: B0018). In place of informed consent from every participant, consent was sought by publishing details of the study on the homepage of the research institute website, as well as on-site posting in the facility.
: Not applicable.
: The authors declare that they have no competing interests.