1 Department of Infectious Diseases, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil. Electronic address: matheus.polly@hc.fm.usp.br.
2 Infection Control Department, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil.
3 Department of Family and Community Medicine, Penn State College of Medicine, Hershey, PA, USA.
4 Laboratory of Medical Investigation 49, University of São Paulo, São Paulo, Brazil.
5 Hospital das Clínicas, University of São Paulo, São Paulo, Brazil.