Beijing Physical Examination Center;
Beijing 100077;
China;
Academy of Mathematics and Systems Science;
Chinese Academy of Sciences;
Beijing 100190;
China;
Medical Engineering Department;
Peking University Third Hospital;
Beijing 100191;
China;
School of Public Health;
Beijing Municipal Key Laboratory of Clinical Epidemiology;
Capital Medical University;
Beijing 100069;
China;
Cente Of Quality Control and Improvement for Physical Check Up;
Beijing Municipality;
Beijing 100077;
China;
School of Medicine;
Nankai University;
Tianjin 300071;
China;