Region

A group of countries usually defined by geographical proximity and/or cultural similarities that agree to link together and pool resources for purposes of patient dosimetry. The United Nations classification of regions is available at http://unstats.un.org/unsd/methods/m49/m49regin.htm or http://www.un.org/depts/DGACM/RegionalGroups.shtml

(Adapted from ICRP Publication 135, 2017)

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