1. Department of Mechanical and Aerospace Engineering, The George Washington University, Science & Engineering Hall, 800 22nd Street, NW, Washington, D.C. 20052, United States
2. School of Medicine and Health Sciences, The George Washington University, 2300 I Street, NW, Washington, D.C. 20052, United States
3. Neurological Surgery, The George Washington University, Foggy Bottom South Pavilion, 22nd Street, NW, 7th Floor, Washington, D.C. 20037, United States