RT Journal Article SR Electronic T1 Under-ascertainment of multiple myeloma among participants in UK atmospheric atomic and nuclear weapons tests JF Occupational and Environmental Medicine JO Occup Environ Med FD BMJ Publishing Group Ltd SP e18 OP e18 DO 10.1136/oem.60.12.e18 VO 60 IS 12 A1 S R Roff YR 2003 UL http://oem.bmj.com/content/60/12/e18.abstract AB An inter-comparison of cases of multiple myeloma among UK participants in the UK’s atmospheric atomic and nuclear weapons tests ascertained by direct follow up methods detected at least a third more cases than a strategy relying solely on data linkage between the Office of National Statistics and the Service Records Offices. These finding have implications for the conduct and robustness of follow up studies of long term health effects among participants in nuclear weapons tests.