Received: 13 July 2020
Accepted: 15 September 2020
First Online: 1 October 2020
Ethics approval and consent to participate
: This study was approved by the ethics committee of Tosei General Hospital (receipt no. 797) and was performed according to the Declaration of Helsinki. The identity of the study subjects was kept confidential during data collection.
: Not applicable.
: The authors declare that they have no competing interests.