1. Department of Pharmacology, School of Pharmacy, Xijing Hospital, The Fourth Military Medical University, Shaanxi Province 710032, China.
2. State Key Laboratory of Cancer Biology and Institute of Digestive Diseases, Xijing Hospital, The Fourth Military Medical University, Shaanxi Province 710032, China.
3. Protein Laboratory, Department of Neuroscience and Pharmacology, University of Copenhagen, Copenhagen 2200, Denmark.