65 e-Letters

published between 2007 and 2010

  • What can be learned from the Japanese study of mobile phone use and acoustic neuroma?
    Michael Kundi

    The Japanese case-control study of acoustic neuroma and mobile phone use (Takebayashi et al. (1)) although thoroughly conduced and analysed has still some important limitations. Acoustic neuroma have long latencies (2, 3). Results of 16 studies published between 1985 and 2000 (4) demonstrated tumour growth in 48-70% of patients, stable tumour volumes in 27-50% and involution in 2-10%. The reason for the diverse patterns of...

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  • Modelling mesothelioma risk for workers assembling military gas masks
    John W. Cherrie

    McDonald et al [1] present an updated analysis of a cohort of mostly women who made gas masks incorporating crocidolite asbestos between 1940 and 1944. They found a high risk of death from pleural and peritoneal mesothelioma, confirming the carcinogenicity of crocidolite, but during the last 8 years of follow-up there were no further deaths from mesothelioma (their Figure 1 and Table 3).

    They noted that th...

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  • Is a recommendation for fewer hours sensible?
    Frank W. Darby,

    The authors suggest that reducing the work time is an answer to the discomfort and pain that computer users often get.

    If the discomfort and pain is due, however, to a combination of muscle tension and time, as comments in the section on biological plausibility seem to suggest, is this the only strategy possible?

    Limiting the painful effects of computer use (clearly worthwhile) by time alone may be su...

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  • Occupational exposure to 50 Hz magnetic fields and risk of non-Hodgkin lymphoma.
    Bruce Hocking

    Karapidis etal (1) conducted a population based case-control study of 694 cases of NHL and 694 controls in relation to exposure to occupational 50 Hz magnetic fields. They found an increased risk for workers in the upper quartile of exposure of 1.48 (95% CI: 1.02 -- 2.16) compared to referents and a statistically significant trend of increasing risk with increasing exposure. The risk increased after lagging for five year...

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  • Asthma Aetiology
    Annalisa (Lisa) E Landymore-Lim


    Industrialised countries tend to have a greater number of swimming pools than developing countries. The children of these countries have also usually had a greater exposure to antibiotics.

    Antibiotics are accepted by the medical profession as causing asthma - albeit 'professional asthma' through inhalation during manufacture in the pharmaceutical industry. However, anything that enters the lungs a...

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