1. From Department of Surgery, Vascular, and Endovascular Surgery Unit (C.S., E.C., F.S., G.d.D.), University of Siena, Siena, Italy; Department of Biomedical Sciences (F.I.), Applied Biology Section, University of Siena, Siena, Italy; Department of Neurological, Neurosurgical, and Behaviour Sciences (A.R.), University of Siena, Siena, Italy.