Funding for this research was provided by:
National Natural Science Foundation of China (81602678, 81472797)
Natural Science Foundation of Tianjin City (17JCQNJC12300)
Article History
Received: 7 April 2020
Accepted: 5 July 2020
First Online: 21 July 2020
Compliance with ethical standards
:
: There are no potential conflicts of interest.
: This study was approved by the independent ethics committees at our hospital (no. Ek2019072 and no. LLSP2019-159).