The PSA test, used to screen men for detecting prostate cancer has been declared all but useless by a pioneer in the procedure. Stanford University School of Medicine professor Dr. Thomas Stamey said "The PSA era is over in the United States." Dr. Stamey and colleagues examined more than 1,300 prostate tissue samples removed by urologists at Stanford over the past 20 years. Researchers divided the data from the samples into four five-year periods between 1983 and 2004. They found a substantial decrease in the connection between PSA levels and the amount of prostate cancer over time. In the first...