293
Participants
Start Date
June 30, 2015
Primary Completion Date
July 31, 2016
Study Completion Date
December 31, 2017
No interventions, questionnaire, collect specimen
Beijing Anzhen Hospital, Beijing
General Hospital of Chinese Armed Police Forces, Beijing
Peking University Aerospace Centre Hospital, Beijing
Peking University Shougang Hospital, Beijing
Peking University Aerospace Center Hospital
OTHER
General Hospital of Chinese Armed Police Forces
OTHER
Beijing Anzhen Hospital
OTHER
Peking University Shougang Hospital
OTHER
Beijing Heyiyuan Biotech Co. Ltd.
OTHER
Shenzhen Microbiota Technology Co. Ltd.
UNKNOWN
China Agricultural University
OTHER