"It shouldn't have any impact on clinical practice, because these are not the kind of definitive results that influence clinical decisions, " says JohnBreitner , a professor of medicine at Johns Hopkins University who was a co-author of the Alzheimer's prevention study.
The second sentence is apparently a reference to another study, authored by researcher JohnBreitner and published in the Nov. 6 issue of the Journal of the American Medical Association, that indicated that estrogen replacement might help prevent Alzheimer's but also that there was a big time lag--about a decade--between taking the drugs and seeing any benefit.