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Archived Comments for: Impacts of highway traffic exhaust in alpine valleys on the respiratory health in adults: a cross-sectional study

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  1. Estimation of dispersion parameter sigma

    Christian Schindler, Swiss Tropical and Public Health Institute

    18 March 2011

    In section 5.4, describing the estimation of the dispersion parameter sigma_d it should be written "until a maximum of the likelihood function is reached".

    Competing interests

    None declared