1. Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, Av. Prof. Lineu Prestes 1730, CEP 05508-900, São Paulo, SP, Brazil
2. ‘Tolérance Immunitaire’, Université de Nice Sophia-Antipolis, Hôpital de l'Archet, Route Saint Antoine de Ginestière BP3079, 06202 Nice Cedex 03, France