BLUE CROSS ASSOCIATION, APPELLEE, AND AMERICAN HOSPITAL ASSOCIATION, INTERVENOR-APPELLEE, v. PATRICIA R. HARRIS, SECRETARY OF HEALTH, EDUCATION WELFARE, LEONARD SCHAEFFER, ADMINISTRATOR, HEALTH CARE FINANCING ADMINISTRATION, APPELLANTS. MISSOURI HOSPITAL ASSOCIATION, A PRO FORMA DECREE CORPORATION, KANSAS CITY AREA HOSPITAL ASSOCIATION, A CORPORATION, HOSPITAL ASSOCIATION OF METROPOLITAN ST. LOUIS, A CORPORATION, KANSAS HOSPITAL ASSOCIATION, A CORPORATION, APPELLEES, […]