Funding for this research was provided by:
National Natural Science Foundation of China (81770589)
Shanghai Municipal Commission of Health and Family Planning (201640283)
Received: 12 December 2019
Accepted: 20 July 2020
First Online: 3 August 2020
Ethics approval and consent to participate
: This study has been ethically approved by the Human Ethics Committee of Shanghai Jiao Tong University Affiliated Sixth People’s Hospital (No.2016–73). The given ethics committee waived the need for written consent since all the samples used were collected during the course of routine medical care based on clinicians’ request.
: Not applicable.
: The authors declare that they have no competing interests.