Received: 15 September 2020
Accepted: 25 March 2021
First Online: 4 May 2021
: The study was approved by the ethics committee of the China-Japan Friendship Hospital. The study was performed under Helsinki’s ethical principle. To preserve confidentiality, we coded each patient and removed their original identifications. Informed written consent based on the hospital consent policy was obtained from all participants at the time of admission or clinic visit. Administrative permissions were acquired by our team to access the data used in this research.
: Not applicable.
: The authors declare that they have no further competing interests.