1. Department of Medical System Engineering, Gwangju Institute of Science and Technology, Gwangju, 500712, Republic of Korea
2. Indi Molecular, 6162 Bristol Parkway, Culver City, California 90230, United States
3. Biotechnology Branch, Sensors & Electronic Devices Directorate, U.S. Army Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland 20783, United States