1,172,280
Participants
Start Date
January 1, 2015
Primary Completion Date
December 31, 2021
Study Completion Date
December 31, 2021
No intervention
Exposures of interest would be clearly defined according to a specific research question and identified from the database
The West China Hospital of Sichuan university, Chengdu
Tianjin Health Care Big Data Ltd.
UNKNOWN
Tianjin Health Commission
UNKNOWN
West China Hospital
OTHER