1. From the Institute of Cardiovascular Research, University of Glasgow (J.B.), and the Institute of Applied Health Research, Nursing, Midwifery, and Allied Health Professions Research Unit, Glasgow Caledonian University (A.E.), Glasgow, the Health Services Research Unit (D.C., S.C.C., G.M., C.R.R., M.K.C.) and the Health Economics Research Unit (M.D., G.S., E.T.), University of Aberdeen, and the Department of Vascular Surgery, NHS Grampian, Aberdeen Royal Infirmary (P.B.), Aberdeen, the Edinburgh Clinical...