Letters Mobile phones and brain tumours

Questions about selection, exposure, and tumour incidence

BMJ 2011; 343 doi: http://dx.doi.org/10.1136/bmj.d7893 (Published 06 December 2011) Cite this as: BMJ 2011;343:d7893
  1. Vini G Khurana, neurosurgeon and associate professor1
  1. 1Australian National University Medical School, Canberra, ACT 0200, Australia
  1. vgkhurana{at}gmail.com

Three questions arise about the update of the Danish cohort study of mobile phone use and risk of brain tumours.1

Selection—To which subpopulation do the study’s results apply? Subpopulations such as corporate users, children and adolescents, and people with a family history of cancer might be at a higher risk of developing a brain tumour after near …

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