1. Cardiovascular Department, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, Shandong 250000, P.R. China
2. Foreign Language College, Shandong University of Traditional Chinese Medicine, Jinan, Shandong 250000, P.R. China
3. Cardiovascular Department, Dezhou Municipal Hospital, Dezhou, Shandong 253000, P.R. China