Tetramethylpyrazine as Potassium Channel Opener to Lower Calcium Influx into Cultured Aortic Smooth Muscle Cells - Tsai, Chin-Chuan; Lai, Tung-Yuan; Huang, Wei-Chan; Yang, Tzyylin; Liu, I-Min; Wong, Kar-Lok; Chan, Paul; Cheng, Juei-Tang (Planta Medica, 2003)