31,080
Participants
Start Date
July 1, 2016
Primary Completion Date
July 1, 2026
Study Completion Date
September 1, 2026
No intervention
This is an observational study without any intervention
Beijing Friendship Hospital, Capital Medical University, Beijing
Beijing Tongzhou Yongshun Community Health Service
UNKNOWN
Beijing Tongzhou Lucheng Community Health Service
UNKNOWN
Beijing Tongzhou Xuxinzhuang Community Health Service
UNKNOWN
Beijing Friendship Hospital
OTHER