Funding for this research was provided by:
the Clinical Characteristic Applied Research Projects (Z181100001718084)
The Digestive Medical Coordinated Development Center of Beijing Hospitals Authority (XXZ0404)
National Natural Science Foundation of China (81271901)
Beijing Natural Science Foundation (7152073)
Article History
Received: 10 October 2019
Accepted: 1 September 2020
First Online: 18 September 2020