Affiliation: | (1) Department of Anesthesia, University of Iowa Hospitals and Clinics, Iowa City, IA, USA;(2) Department of Neurology, University of Iowa Hospitals and Clinics, Iowa City, IA, USA;(3) Department of Radiology, Interventional Neuroradiology Division, University of Iowa Hospitals and Clinics, Iowa City, IA, USA;(4) Department of Anesthesiology, Critical Care Division, University of Iowa Hospitals and Clinics, 200 Hawkins Dr., Iowa City, IA 52242, USA; |