Received: 27 December 2019
Accepted: 24 September 2020
First Online: 2 October 2020
Ethics approval and consent to participate
: This study was conducted in accordance with the declaration of Helsinki. This study was conducted with approval from the Ethics Committee of China–Japan Friendship Hospital. Written informed consent was obtained from the participants.
: Consent for publication obtained from the participants.
: The authors declare that they have no competing interests.