From the Division of Cardiovascular Disease, Mayo Clinic, Rochester, Minn (A.S.M.S., M.W., R.W., A.S., D.E.D., V.K.S.); Department of Hypertension and Diabetology, Medical University of Gdansk, Gdansk, Poland (M.W.); Division of Clinical and Administrative Pharmacy, University of Iowa, Iowa City (B.G.P.); and Duke University Medical Center and Duke Clinical Research Institute, Durham, NC (P.B.B.).(At 2004-05-11)