30
Participants
Start Date
April 1, 2023
Primary Completion Date
June 30, 2025
Study Completion Date
December 31, 2025
Restrict subjects' intake of iodine-containing foods
Replace subjects' iodized salt with non-iodized salt.
RECRUITING
Shandong provincial institute for endemic disease control, Jinan
RECRUITING
Tianjin Medical University, Tianjin
RECRUITING
Gansu provincial center for disease control and prevention, Lanzhou
Tianjin Medical University General Hospital
OTHER
Gansu Provincial Centre for Disease Control and Prevention
UNKNOWN
Wenxing Guo
OTHER