1. Department of Traditional Chinese Medicine, Affiliated Hospital of Jining Medical University, Jining, Shandong 272069, P.R. China
2. College of Integrated Chinese and Western Medicine, Jining Medical University, Jining, Shandong 272067, P.R. China
3. School of Public Health, Jining Medical University, Jining, Shandong 272067, P.R. China