Ethical considerations
The
data collected in the study will be entered and stored in a central
computerized system with username assigned centrally and passwords
protected. Only de-identified data will be used for data analysis.
The study was approved by the Institutional Review Board of Peking
University Shougang Hospital (IRBK-2020-014-01), and written informed
consent was obtained from each patient included in the study. The study
protocol conforms to the ethical guidelines of the 1975 Declaration of
Helsinki. The trial is registered on http://www.chictr.org.cn/
(ChiCTR2000034085).