1 Laboratory on Thymus Research, Oswaldo Cruz Institute, Oswaldo Cruz Foundation/Fiocruz Rio de Janeiro, Brazil ; Graduate Program in Cell and Developmental Biology, Institute of Biomedical Sciences, Federal University of Rio de Janeiro Rio de Janeiro, Brazil.
2 Department of Microbiology, Immunology, and Tropical Medicine, Research Center for Neglected Diseases of Poverty, School of Medicine and Health Sciences Washington, DC, USA.