But Dr. Michael S. Lauer, director of the division of prevention and epidemiology at the National Heart , Lung and Blood Institute said it might now be smart to abandon that search.
We are exposing people to significant amounts of radiation and on the other hand we do not have evidence that [the scans lead to] improvement of health," says National Heart Lung and Blood Institute cardiologist Michael Lauer, director of the division of prevention and population sciences.
8 The traditional tripartite division of prevention into primary, secondary, and tertiary prevention is difficult to maintain when considering the healthcare needs of older people.
By now, said Dr. Ernest Hawk, who is chief of the gastrointestinal cancer research group in the institute's division of cancer prevention, about 50 studies show that blocking cox-2 can prevent premalignant and malignant tumors in animals, and not just colon cancers.
"That's exactly right," said Dr. Barnett Kramer, deputy director of the division of cancer prevention at the National Cancer Institute.
Dr. Howard Parnes, chief of the prostate cancer group at the National Cancer Institute's division of cancer prevention, also is convinced.
Dr. Barnett Kramer, director of the division of cancer prevention at the National Cancer Institute, who was not involved with the research project, had another image.
A number of studies that may answer these questions are being underwritten by the National Cancer Institute, but Dr. Peter Greenwald, the director of the institute's division of cancer prevention, said: "The results are mixed and far from definitive.
Dr. Barnett Kramer, deputy director of the division of cancer prevention at the National Cancer Institute, said the surprising results showed "the need to rigorously put belief systems to the test," especially "when you are making recommendations to literally hundreds of millions of people".
Dr. Ernest Hawk, chief of the gastrointestinal cancer group at the National Cancer Institute's division of cancer prevention, said it was already known that the test reduced the colon cancer death rate, by detecting cancers in early stages.
"It's so high in nicotine that the probability of becoming addicted to it with utilization of just one tin is going to be very high," said Bruce W. Adkins, director of the division of tobacco prevention of the West Virginia Bureau for Public Health in Charleston, W.Va. R.J. Reynolds is hoping Snus will appeal to adult tobacco users because it "meets societal expectations as well," Mr. Howard said.
