A review of human carcinogens—Part D: radiation
In June 2009, 20 scientists from nine countries met at the International Agency for Research on Cancer (IARC) to reassess the carcinogenicity of the types of radiation previously classified as “carcinogenic to humans” (Group 1) and to identify additional tumour sites and mechanisms of carcinogenesis. These assessments will be published as part D of Volume 100 of the IARC Monographs.
http://www.thelancet.com/journals/lanonc/article/PIIS1470-2045(09)70213-X/fulltext#bib1