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FIRE is fighting to defend the academic freedom and free expression rights of University of California, Davis School of Medicine professor Michael Wilkes. Wilkes has been under threat of punishment for nearly two years after he co-authored a in the San Francisco Chronicle in which he criticized both the effectiveness of the Prostate-Specific Antigen (PSA) test for cancer screening and UC Davis' sponsorship of an event he felt overly promoted the PSA test. Wilkes was threatened with employment sanctions and told by UC Davis attorneys that he could be liable for "defamation." FIREand the UC Davis Academic Senate have called on UC Davis to reject these blatant violations of Wilkes' academic freedom. Now, Johns Hopkins University professor Steven Salzberg joins in, . Stay tuned for more updates from FIREon this troubling case.