1. Department of Neurology, West Virginia University, Morgantown, West Virginia, USA
2. Department of Neurology, University of Minnesota, Minneapolis, Minnesota, USA
3. Ethics Committee, Memorial Sloan Kettering Cancer Center, New York, New York, USA
4. Department of Neurology, Memorial Sloan Kettering Cancer Center, New York, New York, USA
5. Department of Nursing, Memorial Sloan Kettering Cancer Center, New York, New York, USA
6. Department of Anesthesiology and Critical Care, Memorial Sloan Kettering Cancer Center, New York, New York, USA
7. Department of Anesthesiology, Weill Cornell Medical College, New York, New York, USA