1. Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, P. R. China
2. College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan 250014, P. R. China
3. Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Hubei Clinical Center and Key Lab of Intestinal & Colorectal Diseases, Wuhan 430072, P. R. China