Regulations.gov document: Spiess H, Mays CW, Chmelevsky D. 1989. Malignancies in patients injected with 224Ra. In: Taylor DM, Mays CW, Gerber GB, Thomas RG, eds. Risks from radium and thorotrast. London, England: British Institute of Radiology PHASE-III-RADS-III-D2C-110 — retained record — High Signal
Regulations.gov document: Spiess H, Mays CW, Chmelevsky D. 1989. Malignancies in patients injected with 224Ra. In: Taylor DM, Mays CW, Gerber GB, Thomas RG, eds. Risks from radium and thorotrast. London, England: British Institute of Radiology PHASE-III-RADS-III-D2C-110