120
Participants
Start Date
January 31, 2014
Primary Completion Date
March 31, 2015
Study Completion Date
June 30, 2015
age
subjects stratified according to age: 20-30 years (Group 1), 31-40 years (Group 2), 41-50 years (Group 3), 51-60 years (Group 4), 61-70 years (Group 5), and 71-80 years (Group 6).
China Three Gorges University, Yichang
China Three Gorges University, Yichang, China
OTHER