Environmental Health

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Open Access Research

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

Marianne E Hazenkamp-von Arx, Christian Schindler*, Martina S Ragettli, Nino Künzli, Charlotte Braun-Fahrländer and Lee-Jane S Liu

Environmental Health 2011, 10:13 doi:10.1186/1476-069X-10-13

Estimation of dispersion parameter sigma

Christian Schindler   (2011-03-18 15:02)  Swiss Tropical and Public Health Institute

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

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