Childhood leukaemia in Belarus, Russia, and Ukraine following the Chernobyl power station accident: results from an international collaborative population-based case-control study. - Davis S; Day RW; Kopecky KJ; Mahoney MC; McCarthy PL; Michalek AM; Moysich KB; Onstad LE; Stepanenko VF; Voillequé PG; Chegerova T; Falkner K; et al. (International journal of epidemiology, 2006)