There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.
Abstract
The optimal upper limit of the normal range for prostate-specific antigen (PSA) is
unknown. We investigated the prevalence of prostate cancer among men in the Prostate
Cancer Prevention Trial who had a PSA level of 4.0 ng per milliliter or less.