1 Department of Paediatrics, Clinical Hospital, Faculty of Medicine, Universidade Federal de Goiás, Primeira Avenida, s/n, Setor Universitário, Goiânia 74673-520, Brazil. Electronic address: [email protected].
2 Department of Paediatrics, Clinical Hospital, Faculty of Medicine, Universidade Federal de Goiás, Primeira Avenida, s/n, Setor Universitário, Goiânia 74673-520, Brazil.