More doesn't mean better, according to U.K. doctors who challenge the idea of overly aggressive care, which they estimate causes 30,000 deaths among Medicare recipients in the United States each year, according to a study in BMJ this week. In addition, researchers estimate that unnecessary interventions make up 10 percent to 30 percent of healthcare spending, or $250 billion to $800 billion annually. They point to malpractice, unproven technology and failure to inform patients of potential harm from elective procedures as reasons for overtreatment. They also called for international collaboration to reduce waste on unnecessary care. Announcement