1. Key Laboratory of Bioresources and Ecoenvironment (Ministry of Education), College of Life Sciences, Sichuan University, Chengdu 610064, People's Republic of China
2. Sichuan Engineering Research Center for Medicinal Animals, Xichang 615000, People's Republic of China
3. College of Life Science and Engineering, Chongqing Three Gorges University, Chongqing 404100, People's Republic of China