Thomas Marichal1,2,3. 1. Laboratory of Immunophysiology, GIGA Institute, Liège University, Liege, Belgium. t.marichal@uliege.be. 2. Faculty of Veterinary Medicine, Liège University, Liege, Belgium. t.marichal@uliege.be. 3. WELBIO, Walloon Excellence in Life Sciences and Biotechnology, Wallonia, Belgium. t.marichal@uliege.be.