[1] INST RECH CLIN MONTREAL, IMMUNOL LAB, MONTREAL, PQ, CANADA
[2] CHU LAVAL, DEPT IMMUNOL & RHUMATOL, QUEBEC CITY, PQ, CANADA
[3] UNIV MONTREAL, DEPT MICROBIOL & IMMUNOL, MONTREAL, PQ, CANADA
[4] MCGILL UNIV, DEPT MICROBIOL & IMMUNOL, MONTREAL, PQ, CANADA