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Figure 1 | Environmental Health

Figure 1

From: Childhood brain tumours and use of mobile phones: comparison of a case–control study with incidence data

Figure 1

Age-standardized incidence rates for brain and central nervous system tumours. Rates are shown for the age group 5–19 years living in the Nordic Countries obtained from NORDCAN (http://www-dep.iarc.fr/nordcan/English/frame.asp], accessed January 9, 2012). Regular mobile phone use is defined as having had at least one call per week during a period of at least six months. We estimated the proportion of regular mobile phone users in this age group by combining data from the control subjects in CEFALO with subscriber data from Sweden.

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