Affiliation: | 1. Department of Pediatrics, Botucatu Medical School, S?o Paulo State University, 18618‐970 Botucatu, S?o Paulo, BrazilAddress correspondence to Dr. Cilmery Suemi Kurokawa, Department of Pediatrics, Botucatu Medical School, S?o Paulo State University, 18618‐970, Botucatu, S?o Paulo, Brazil. Fax: + 55‐14‐3811‐3744. E‐mail:;2. Department of Microbiology and Immunology, Institute of Biosciences, S?o Paulo State University, Botucatu, S?o Paulo, Brazil |