[1] MCMASTER UNIV, DEPT PATHOL, HAMILTON L8N 3Z5, ONTARIO, CANADA
[2] MCMASTER UNIV, DEPT BIOCHEM, HAMILTON L8N 3Z5, ONTARIO, CANADA
[3] MCMASTER UNIV, DEPT MOLEC VIROL, HAMILTON L8N 3Z5, ONTARIO, CANADA
[4] MCMASTER UNIV, IMMUNOL PROGRAM, HAMILTON L8N 3Z5, ONTARIO, CANADA