The American Legion v. Edward Derwinski, Secretary, Department of Veterans Affairs Donna E. Shalala, Secretary, Department of Health and Human Services William L. Roper, M.D., Director, Centers for Disease Control Vernon N. Houk, Director, Center for Environmental Health and Injury Control Center United States of America, Vietnam Veterans of America Harold A. Butler Carol Ridolfi-Delaney Marel J. MacKi Beverly Nehmer v. Edward Derwinski, Secretary, Department of Veterans Affairs Donna E. Shalala, Secretary, Department of Health and Human Services William L. Roper, M.D., Director, Centers for Disease Control Vernon N. Houk, Director, Center for Environmental Health and Injury Control Center United States of AmericaFiledApr 25, 1995