BMJ OpenEfficacy of sensorimotor cortical paired associative magnetic stimulation prior to exercise on balance and gait in Parkinson's disease: study protocol for a randomised controlled trial in ChinaBy Cheng Li, Yanlei Ge, Yixiu Wang, +2Show 2 more authors, Lijiao MengInterventionsPaperThe paperCheng Li, Yanlei Ge, Yixiu Wang, +2Show 2 more authors, Ran An, Shaxin Liu, Lijiao MengSichuan UniversityBMJ Open, 23 Sep 2026doi.org/10.1136/bmjopen-2026-120226PubMed 42778232