[1] INST PASTEUR, DEPT MOLEC BIOL, F-75724 PARIS 15, FRANCE
[2] INST PASTEUR, DEPT IMMUNOL, F-75724 PARIS 15, FRANCE
[3] UNIV ULM, DEPT BACTERIOL, INST MED MICROBIOL, W-7900 ULM, GERMANY
[4] OTTAWA CIVIC HOSP, LOEB MED RES INST, OTTAWA, ON K1Y 4E9, CANADA
[5] UNIV OTTAWA, PROGRAM PHYSIOTHERAPY, OTTAWA, ON, CANADA
[6] UNIV OTTAWA, DEPT PHYSIOL, OTTAWA, ON, CANADA