1. Department of Pharmacy, Xijing Hospital, Air Force Military Medical University, Xi'an, Shaanxi�710032, P.R. China
2. School of Pharmacy, Shaanxi�University of Chinese Medicine, Xianyang, Shaanxi�712046, P.R. China
3. School of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang, Shaanxi 712046, P.R. China
4. Department of Pharmacy, Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, Chengdu, Sichuan 610072, P.R.�China