Men who get tested for prostate specific antigen, or PSA, have a 13.5% chance of landing in the danger zone.

FORBES: Medical Tests

But UC David professor Michael Wilkes investigated and learned that the seminar was primarily a sales pitch about the prostate specific antigen (PSA) test, and that its main message was that men should get tested regularly beginning at age 40.

FORBES: UC Davis threatens professor for writing about PSA testing

Well, there is a reference to the pain of the test itself, presumably the PSA (Prostate Specific Antigen) test.

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