1. Medical and Electronic Experimental Center, The TCM Hospital of Shijiazhuang Affiliated to Hebei University of Chinese Medicine, Shijiazhuang, Hebei 050051, P.R. China
2. Institute of Chemical Engineering, Shijiazhuang University, Shijiazhuang, Hebei 050035, P.R. China
3. The Third Hospital of Shijiazhuang, Shijiazhuang, Hebei 050011, P.R. China