Toward therapeutic electrophysiology: beta-band suppression as a biomarker in chronic local field potential recordings by Feldmann, LK, Lofredi, R, Neumann, WJ, Al-Fatly, B, Roediger, J, Bahners, BH, Nikolov, P, Denison, T, Saryyeva, A, Krauss, JK, Faust, K, Florin, E, Schnitzler, A, Schneider, GH, Kühn, AA