Funding for this research was provided by:
the Science, Technology & Innovation Commission of Shenzhen Municipality (JCYJ20160422144516003)
Received: 31 August 2019
Accepted: 20 May 2020
First Online: 3 June 2020
Ethics approval and consent to participate
: This is a retrospective study. This study was approved and the permission to access the medical records was granted by the Medical Ethics Committee of the Shenzhen People’s Hospital (No. LL-KT201603008).
: Not applicable.
: The authors declare that there is no conflict of interests.