Funding for this research was provided by:
Innovative Research Group Project of the National Natural Science Foundation of China (81770933)
Received: 4 September 2019
Accepted: 30 December 2019
First Online: 21 January 2020
Ethics approval and consent to participate
: This retrospective study has been approved and the need for consent to participate in the study was waived by Shanghai Xinhua Hospital ethics committee, affiliated to Shanghai Jiao Tong University School of Medicine.
: Not applicable.
: The authors declare that they have no competing interests.