1. Department of Epidemiology, School of Public Health University of Sao Paulo São Paulo São Paulo Brazil
2. Department of Parasitology, Institute of Biomedical Sciences University of Sao Paulo São Paulo São Paulo Brazil
3. Department of Life Sciences Natural History Museum London U.K.
4. Butantan Institute São Paulo São Paulo Brazil
5. Institute of Tropical Medicine University of Sao Paulo São Paulo São Paulo Brazil