1 McMaster Immunology Research Centre, M. G. DeGroote Institute for Infectious Disease Research and Department of Medicine, McMaster University, Hamilton, Ontario, Canada.
2 Farncombe Family Digestive Health Research Institute and Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada.
3 Department of Immunology, Zhejiang University, Zhejiang, China.
4 Department of Chemistry and Chemical Biology, McMaster University, Hamilton, Ontario, Canada.
5 McMaster Immunology Research Centre, M. G. DeGroote Institute for Infectious Disease Research and Department of Medicine, McMaster University, Hamilton, Ontario, Canada. xingz@mcmaster.ca.