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We thank Dr Hardell for his comment1 on our article concerning analyses regarding head position of mobile phone use.2
In our analysis on ipsilateral use, we included cases who used their mobile phone on the same side as the tumour or on both sides of the head, cases who were not regular users (the reference category) and all their matched controls. In our analysis on contralateral use, we used cases who used their mobile phone on the opposite side as the tumour, cases who were not …
Funding The study was supported by grants from the Fondation de France, the Agence Française de Sécurité Sanitaire de l’Environnement et du Travail, the Association pour la Recherche contre le Cancer, the Ligue contre le Cancer, the Institut National de la Santé Et de la Recherche Médicale—ATC Environnement et Santé.
Competing interests None.
Patient consent Obtained.
Ethics approval CCTIRS, CNIL.
Provenance and peer review Not commissioned; internally peer reviewed.
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