1. Department of Neurosurgery (M.Z., A.P., E.R., D.H.), University of Iowa Hospital and Clinics.
2. Department of General Surgery, Department of Surgical and Neuroscience Intensive Care Unit (L.A.), University of Iowa Hospital and Clinics.
3. Department of Neurology, Neuro Interventional Radiology (E.A.S.), University of Iowa Hospital and Clinics.
4. Department of Epidemiology and Public Health (J.C.T.), University of Iowa Hospital and Clinics.