Received: 9 December 2020
Accepted: 31 January 2021
First Online: 16 February 2021
Ethics approval and consent to participate
: All methods of the present research were carried out in accordance with the Declaration of Helsinki and were approved by the local Institutional Review Board (Committee on Ethics of Biomedicine, Changhai Hospital, Shanghai, China) Informed consent was waived for this retrospective study.
: Written informed consent to publish this information was obtained from study participants.
: The authors declare that they have no competing interests.