1. School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea.
2. Welfare & Medical ICT Research Department, Electronics and Telecommunications Research Institute, Daejeon 34129, Republic of Korea.
3. Department of Mechanical Engineering, University of Colorado Boulder, Boulder, CO 80309, USA.
4. Department of Electrical, Computer, and Energy Engineering, University of Colorado Boulder, Boulder, CO 80309, USA.
5. Department of Anesthesiology, Washington University in St. Louis, St. Louis, MO 63110, USA.
6. Department of Pharmaceutical and Administrative Sciences, St. Louis College of Pharmacy, St. Louis, MO 63110, USA.
7. Center for Clinical Pharmacology, St. Louis College of Pharmacy and Washington University School of Medicine, St. Louis, MO 63110, USA.
8. Washington University Pain Center, Washington University in St. Louis, St. Louis, MO 63110, USA.
9. Department of Psychiatry, Washington University in St. Louis, St. Louis, MO 63110, USA.
10. Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USA.
11. George W. Woodruff School of Mechanical Engineering and Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.