Funding for this research was provided by:
National Nature Science Foundation of China (81873854, 81672504)
Special Fund for Clinical Medical Research of Chinese Medical Association (17020390708)
Clinical Reserch Physician Program of Tongji Medical College (5001530058, 5001530077)
Article History
Received: 28 November 2019
Accepted: 25 February 2020
First Online: 18 March 2020
Compliance with ethical standards
:
: The authors declare that there are no conflicts of interest.
: The manuscript does not contain clinical studies or patient data.
: For this type of study, formal consent is not required.