1. From the Department of Neurology (M.S., D.R.), the Research Institute for Internal Medicine (A.M., F.B.), and the Department of Thoracic and Cardiac Surgery (J.L.S.), Rikshospitalet-Radiumhospitalet Medical Center, University of Oslo, Oslo, Norway, and the Department of Medical Engineering (R.B.), University of Applied Sciences, Ulm, Germany.