Funding for this research was provided by:
National Key Research and Development Program of China (2019YFC1712103)
Received: 8 August 2020
Accepted: 20 March 2021
First Online: 7 April 2021
: This trial has been approved by research ethical committees of Beijing University of Chinese Medicine, the Affiliated Hospital of Hebei University of Chinese Medicine, the First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, the Teaching Hospital of Chengdu University of Traditional Chinese Medicine, and the Affiliated Hospital of Shandong University of Traditional Chinese Medicine. The recruiter in each branch center will be responsible for obtaining the informed consent of patients. Written informed consent will be obtained from patients prior to enrolment in the study.
: Not applicable.
: The authors declare that they have no competing interests.