1 From the Departments of Clinical Neurological Sciences (A. Branch, T.L.H.C., A. Budhram) and Pathology and Laboratory Medicine (A. Budhram) and Divisions of Nephrology (D.M.C.) and Critical Care Medicine (J.B.), Western University, London Health Sciences Centre; Division of Rheumatology (M.M.N., C.T.A.), Department of Medicine, Western University, St. Joseph's Health Care, Ontario, Canada.