Funding for this research was provided by:
Natural Science Foundation of Shanghai (16ZR1420700)
Foundation of Renji Hospital South Campus, Shanghai Jiao Tong University School of Medicine (2017PYQB04, 2019NYBSZX02)
Medical Guidance Project from Shanghai Science and Technology Committee (19411971200)
Foundation of Renji Hospital South Campus, Shanghai Jiao Tong University School of Medicine. (2016PWGY02)
Founding of Shanghai Municipal Commission of Health and Family Planning (20174Y0050)
Received: 11 February 2020
Accepted: 9 October 2020
First Online: 20 November 2020
Ethics approval and consent to participate
: This is a retrospective study approved by the Ren Ji Hospital Ethics Committee with waiver of informed consent from patients.
: Not applicable.
: Both authors declare that they have no competing interests.