1. From the Phoenix Veterans Affairs (VA) Health Care System, Phoenix (P.D.R., W.C.D.); the Hines VA Cooperative Studies Program Coordinating Center and Hines VA Hospital (N.V.E., G.D.B., D.J.R.) and the VA Pharmacy Benefits Management Services (M.M.), Hines, IL; and the VA Center for Clinical Management Research, VA Ann Arbor Healthcare System, Ann Arbor, MI (W.L.W., R.A.H.).