Received: 20 April 2020
Accepted: 25 May 2020
First Online: 10 June 2020
Ethics approval and consent to participate
: This study was approved by the Ethical Committee of Tongji Hospital of Tongji Medical College at Huazhong University of Science and Technology. Written informed consent was not obtained because the data were analyzed retrospectively and anonymously.
: Not applicable.
: The authors declare that they have competing interests.