1. Immunology Laboratory, Faculty of Medicine, B.P. 184, F54505 Vandoeuvre-les-Nancy Cédex, france
2. Diagnostica Pasteur, Marnes La Coquette, France
3. Sanofi Research, Montpellier, France
4. lmmunology Laboratory, Faculty of Pharmacy, Montpellier,France
5. Immunology Laboratory, Faculty of Medicine, Vandoeuvre-les-Nancy, France