BMJ Publishing Group, BMJ, apr15 5(346), p. f2023-f2023
DOI: 10.1136/bmj.f2023
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Objective To determine the association between concentration of prostate specific antigen (PSA) at age 40-55 and subsequent risk of prostate cancer metastasis and mortality in an unscreened population to evaluate when to start screening for prostate cancer and whether rescreening could be risk stratified.