The Medical Protective Co.; Waste Corporation of America, Inc., Waste Corporation of Missouri, Inc., Arkansas Farm Bureau Insurance Co.; Westport Insurance Co.; Professional Risk Management Services; Missouri Doctors Mutual Insurance Co.; EMC Insurance Co.; Wausau Insurance Co.; Nationwide Insurance Cos.; Federated Mutual Insurance Co.; American Telephone & Telegraph Co.; American National Property and Casualty Co.; Ophthalmic Mutual Insurance Co.; Colonia Insurance Co.; Prudential Insurance Co.; Phillips Petroleum Co.; Sentry Insurance Co.; Western Surety Co.; American International Insurance Group; American Continental Insurance Co.; Lawyers Title Insurance Co.; Admiral Insurance Co.