Frank Kuehner, Dorothy Burayak, Richard Burns, Alicehetherington, Frank Jennings, Jr., Philip Fisher, Clintonroyal, Solomon Katz, Raymond Staniewicz, James N. Mckeown,james Loughlin, Margaret Douglas, Lawrence Cook, Stevensverdlow, Elaine Fleigelman and Riva Yanovskaya, on Behalfof Themselves and All Others Similarly Situated, Jamesmckeown and Riva Yanovskaya, on Behalf of Themselves and Allothers Similarly Situated, Appellants, v. Richard Schweiker, Secretary, U.S. Department of Health Andhuman Services, John A. Svahn, Commissioner, Social Securityadministration, Barry Stern, Secretary, Pa. Dept. of Labor &industry, John Delpaine, Director, Pa. Disabilitydetermination Bureau