A UCLA study of the rate of uninsurance in metropolitan markets found wide variance — from 7 percent in Akron, Ohio, to 35 percent in El Paso, Texas — and that large numbers of immigrants correlate with low rates of health coverage.... The most cost-effective test for colon cancer? Flexible sigmoidoscopy every five years, says the U.S. Agency for Healthcare Research and Quality. Cost per life-year saved was $12,636.... Add HIV and AIDS to the list of conditions requiring standing referrals to specialists in California, thanks to legislation signed by Gov. Gray Davis.... A magistrate ruled that the Massachusetts Board of Registration in Medicine went too far when it suspended the license of a cardiologist who left a profane message on a Blue Cross Blue Shield of Massachusetts answering machine. The physician called employees "criminals" and threatened to beat them "to death," but psychologists who examined him agreed he had no intention of carrying out his threats. The board must decide whether to accept the ruling.