1. College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, Shangdong 250355, P.R. China
2. Laboratory of Microvascular Medicine, Medical Research Center, The First Affiliated Hospital of Shandong First Medical University and Shandong Provincial Qianfoshan Hospital, Jinan, Shandong 250014, P.R. China
3. Department of Gerontology, The First Affiliated Hospital of Shandong First Medical University, Jinan, Shandong 250014, P.R. China
4. Department of Neurosurgery, The First Affiliated Hospital of Shandong First Medical University, Jinan, Shandong 250014, P.R. China