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To compare the reference values for PEF suggested by other authors in 1963, 1989 and 2001 (for populations in the USA, England and Cuba, respectively) with those obtained from a population sample in the city of São Carlos, Brazil, and to determine whether there is concordance among them.

Comparação de valores de PFE em uma amostra da população da cidade de São Carlos, São Paulo, com valores de referência