Received: 6 January 2021
Accepted: 23 March 2021
First Online: 31 March 2021
: This study was approved by the Ethics Committees of two participating hospitals in China (Union Hospital, affiliated with Tongji Medical College, Huazhong University of Science and Technology) and Iran (Tabriz University of Medical Sciences, approval number: IR. TBZMED. REC.1399.008). This study was conducted retrospectively, all data were anonymized and deidentified prior to analysis and participant consent was not necessary.
: Not applicable.
: The authors declare that they have no competing interests.