Bibliographical noteFunding Information:
This work was supported by a Discovery grant (RGPiN 250129-07) to C.M.D. from the Natural Sciences and Engineering Research Council of Canada (NSERC) and a Canada Research Chair and by an NSERC Discovery grant (RGPiN SD-25120-09) to J.H. This study was also supported by the Fonds Québécois de la Recherche sur la Nature et les Technologies (S.C.), the Fondation Armand-Frappier (S.C. and G.P.) and the Centre de Recherche en infectiologie Porcine (S.C., C.M.D. and J.H.).