1. Seattle Biomedical Research Institute, Seattle, Washington
2. McGill University Health Center, Montreal, Canada
3. U.S. Environmental Protection Agency, National Exposure Research Laboratory, Cincinnati, Ohio
4. National Institute of Public Health and the Environment, Bilthoven, The Netherlands
5. Departmento de Microbiologia, Immunologia e Parasitologia, Universidade Federal de São Paulo, Escola Paulista de Medicina, UNIFESP-EPM, São Paulo, Brazil