1. Department of Lung Disease, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, Shandong 250011, P.R. China
2. Department of Traditional Chinese Medicine, Shandong Academy of Occupational Health and Occupational Medicine, Shandong Academy of Medical Sciences, Jinan, Shandong 250062, P.R. China
3. Department of Chinese Internal Medicine, Shandong University of Traditional Chinese Medicine, Jinan, Shandong 250355, P.R. China
4. Department of Endocrinology, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, Shandong 250011, P.R. China