All researchers including investigators, data collectors (i.e., research assistants), study coordinators, site monitors, data managers, outcome assessors, and a statistician will receive special training regarding the standard procedure and data management. During the recruitment period, data collectors will afford the collection of the baseline characteristics of participants and record them on study-specific CRFs. Data collectors will also collect and record the reports of laboratory findings and outcome measures on the CRFs during the recruitment or follow-up periods. Data will then be entered into Excel spreadsheets or EpiData manager by two collectors independently. Outcomes will be assessed by the principal investigator blind to intervention allocation during the study period. In the course of the trial, a data manager will be assigned to manage the relevant data. Researchers will assure that any personal information of participants collected remains strictly confidential. All data will be identified using participant numbers instead of directly displaying participant’s personal information. Access to the information will be restricted to the principal investigator or to researchers directly involved in the research at all times, before, during, and after the research activities. The data manager will check all data recorded on the CRFs and electronic documents after every visit and report back to the principal investigator and data collectors if there is any discrepancy. All data will be managed based on the Data Protection Act of 1998 [29]. All hard copy documents related to the research will be saved in a locked filing cabinet of Good Clinical Practice (GCP) Center of West China Hospital while electronic documents will be stored in a special computer with protected password. All research documents will be saved for at least 5 years after publication. If readers have any questions about our published data, they could contact our corresponding author (i.e., the principal investigator) to obtain the original data.

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