1 Department of Microbiology, Immunology and Transplantation, Allergy and Clinical Immunology Research Group, KU Leuven, Leuven, Belgium. Electronic address: rik.schrijvers@uzleuven.be.
2 Center for Drug Safety and Immunology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tenn; Institute for Immunology and Infectious Diseases, Murdoch University, Murdoch, WA, Australia.