**Author details**

Eun Kwang Lee1†, Hocheon Yoo2† and Chi Hwan Lee3 \*

1 Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA

2 Electronic Engineering, Gachon University, 1342 Seongnam-daero, Seongnam 13120, South Korea

3 Weldon School of Biomedical Engineering, School of Mechanical Engineering, School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA

\*Address all correspondence to: lee2270@purdue.edu

† These authors contributed equally.

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