1. The National and Local Joint Engineering Laboratory of Animal Peptide Drug Development, College of Life Sciences, Hunan Normal University, Changsha, Hunan 410081, China
2. Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Hunan Normal University), Ministry of Education, College of Chemistry & Chemical Engineering, Changsha, Hunan 410081, China
3. Department of Geriatric Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, China