The article reports on a law suit filed by the Salt Institute, and industry lobbying group, under the Data Quality Act, challenging a study published by the "New England Journal of Medicine." The study found that reducing salt in the diet could lower blood pressure, even in people without hypertension. The findings were posted by the American Heart Institute in its web site. The U.S. Chamber of Commerce joined in the suit, which was dismissed by a district court judge and later by an appeals court. INSET: INFORMATION WARFARE.