Received: 3 January 2021
Accepted: 15 February 2021
First Online: 28 April 2021
Ethics approval and consent to participate
: The study was conducted in accordance with the Declaration of Helsinki (as revised in 2013). The study was approved by the ethics board of Peking University People’s Hospital Review Board (2020PHB 125-01) and all patients signed the preoperative informed consent.
: The authors have no conflicts of interest to declare.