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Reply to ‘on the association of cell phone exposure with childhood behaviour’ by Sudan et al.
  1. Mònica Guxens1,
  2. Roel Vermeulen1,2,
  3. Anke Huss1,3
  1. 1Division of Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands
  2. 2Julius Centre for Public Health Sciences and Primary Care, University Medical Centre, Utrecht, The Netherlands
  3. 3Institute for Social and Preventive Medicine, University of Bern, Bern, Switzerland
  1. Correspondence to Dr Anke Huss, Division of Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, Jenalaan 18d, Utrecht 3584 CK, The Netherlands; a.huss{at}

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We thank Sudan et al1for their reflections on our work. We appreciate that they reanalysed their data and provided a table of estimates restricting to prenatal cell phone, making their results comparable with that of ours. We acknowledge that, since our study was smaller compared with their study, we obtained less precise risk estimates, but do not agree that our study is uninformative.2 We showed in our paper a consistent non-association between maternal cell phone use and cordless phone use on behavioural problems in children. Even though exposure from cell phones is not identical to that of cordless phones, we would like to highlight that if a biological effect of the exposure to radiofrequency–electromagnetic fields (RF–EMFs) exists, we would expect to observe some similarities regarding the health effects related to cell phones and cordless phones. The fact that we do not …

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