1 From the Departments of Neurology (B.C.C., M.L.M., M.T.) and Laboratory Medicine and Pathology (E.S.T.), Mayo Clinic, Rochester, MN. [email protected].
2 From the Departments of Neurology (B.C.C., M.L.M., M.T.) and Laboratory Medicine and Pathology (E.S.T.), Mayo Clinic, Rochester, MN.