Closed-Loop Neuromodulation for Parkinson's Disease: Current State and Future Directions. - Samhwan Kim; Seongtak Kang; Jinmo Kim 001; Doyoung Lee; Sanghee Kim; Junghyup Lee; Kyung-In Jang; Yongseok Oh; Jong-Cheol Rah; Man Seung Huh; Sun Ha Paek; Ji-Woong Choi (IEEE Trans. Mol. Biol. Multi Scale Commun., 2021)