1. Department of Anesthesiology, Perioperative and Pain Medicine, Stanford School of Medicine, CA, USA
2. Stanford Stroke Center, Stanford School of Medicine, CA, USA
3. Department of Neurology and Neurological Sciences, Stanford School of Medicine, CA, USA
4. Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford School of Medicine, CA, USA
5. Department of Neurosurgery, Stanford School of Medicine, CA, USA