1. College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, Shandong 250355, P.R. China
2. College of Chinese Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, Shandong 250355, P.R. China
3. College of Nursing, Shandong University of Traditional Chinese Medicine, Jinan, Shandong 250355, P.R. China