Chernobyl cleanup workers had significantly increased risk of leukemia Findings may help estimate cancer risk from low-dose exposures like CT scans Peer-Reviewed Publication University of California - San Francisco image: This is an image of Lydia Zablotska, MD, PhD. view more Credit: UCSF A 20-year study following 110,645 workers who helped clean up after the 1986 Chernobyl nuclear power plant ac