1. Hospital Maternidade Santa Joana, São Paulo, Brazil.
2. Instituto de Cardiologia do Rio Grande do Sul, Porto Alegre, Brazil.
3. International Nosocomial Infection Control Consortium, Buenos Aires, Argentina.
4. Hospital Anchieta LTDA, Taguatinga, Brazil.
5. Hospital Universitario de Taubaté, Taubaté, Brazil.