from the Middlesex Hospital's newsletter:

Middlesex Hospital and the American Cancer Society are joining together to provide an unprecedented opportunity for local residents to participate in a historic study that has the potential to change the face of cancer for future generations. Men and women between the ages of 30 and 65 who have never been diagnosed with cancer are needed to participate in the American Cancer Society's Cancer Prevention Study-3 (CPS-3).
CPS-3 will help researchers better understand the lifestyle, environmental, and genetic factors that cause or prevent cancer.