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Letter
Occupational exposure to magnetic fields
  1. M Kundi1
  1. 1Institute of Environmental Health, Department for Occupational and Social Hygiene, Kinderspitalgasse 15, A-1095 Vienna, Austria

    https://doi.org/10.1136/oem.59.7.496

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      While Savitz's point of view expressed in the editorial1 that epidemiological methodology faces its limits when the risk is small, exposure assessment is poor, and biological insight is lacking, must be reinforced, it is not so clear whether or not this view is applicable to the field of exposure to extremely low frequency electromagnetic fields (ELF EMF). Unfortunately some of the studies that could contribute to an evaluation of the relation between ELF EMF exposure and cancer have serious deficits. This is apparently also the case for the paper by Sorahan and colleagues.2 First it has to be stressed that there is no such diagnostic entity as “brain tumour”. Brain tumours comprise a heterogeneous group of both malign and benign neoplasms generating from different tissues, with different growth rates and other essentially different features …

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