1 Department of Pediatrics, Santa Casa de São Paulo School of Medical Sciences, 01221-020 São Paulo, Brazil; Department of Infectious Diseases and Pediatric Cardiovascular Intensive Care Units, Beneficência Portuguesa de São Paulo Hospital, São Paulo, Brazil. Electronic address: [email protected].
2 Department of Pediatrics, Santa Casa de São Paulo School of Medical Sciences, 01221-020 São Paulo, Brazil.