Abstract
1 Department of Paediatrics, School of Medicine, Federal University of Bahia, Salvador, Brazil
2 Faculty of Public Health, São Paulo University, São Paulo, Brazil
3 Bacteriology Branch, Adolfo Lutz Institute, São Paulo, Brazil
4 Hospital de Niños Elizalde, Buenos Aires, Argentina
5 Department of Pediatrics, School of Medicine, Federal University of Minas Gerais, Belo Horizonte, Brazil
6 Santa Casa de São Paulo Medical School, São Paulo, Brazil
7 Hospital Municipal Durand, Buenos Aires, Argentina
8 Martagão Gesteira Paediatric Institute, Rio de Janeiro, Brazil
9 Hospital Infantil Dr Robert Reid Cabral, Santo Domingo, Dominican Republic
10 Instituto Materno Infantil de Pernambuco, Recife, Brazil
11 Child and Adolescent Health Unit, Pan American Health Organization, Washington, DC, USA
Correspondence
Cristiana M. Nascimento-Carvalho
(nascimentocarvalho{at}hotmail.com )