Witnesses: Dara Corrigan, Acting Principal Deputy Inspector General, Office of the Inspector General, Dept. of Health & Human Services (HHS); Leslie G. Aronovitz, Dir., Health Care -- Program Admin. & Integrity Issues, Gen. Accounting Office (GAO); Herbert Kuhn, Dir., Center for Medicare Mgmt., Centers for Medicare & Medical Services, HHS; Rebecca Lewandowski, a witness/defendant who pled guilty to DME fraud; Laura Cohen, physical therapist & assistive tech. practitioner, Consultant to Triwest Region of Tricare, Tucson, AZ; Henry Claypool, co-founder of Advancing Independence, Wash., DC; & Kay Cox, pres. & CEO, Amer. Assoc. for Homecare, Alexandria, VA.Grassley, Charles E. is the author of 'Taking Taxpayers for a Ride : Fraud and Abuse in the Power Wheelchair Program: Congressional Hearing', published 2005 under ISBN 9780756747190 and ISBN 0756747198.