CHICAGO - Here's some medical news you can trust: A new study confirms that what doctors once said was good for you often turns out to be bad — or at least not as great as initially thought. The report is a review of major studies published in three influential medical journals between 1990 and 2003, including 45 highly publicized studies that initially claimed a drug or other treatment worked. Subsequent research contradicted results of seven studies — 16 percent — and reported weaker results for seven others, an additional 16 percent. That means nearly one-third of the original results...
