Development of a quantitative assessment for abnormal flexor synergy index in patients with stroke: a validity and responsiveness study. - Ito, Daisuke; Kawakami, Michiyuki; Hosoi, Yuichiro; Kamimoto, Takayuki; Yamada, Yuka; Takemura, Ryo; Tsuji, Tetsuya (Journal of NeuroEngineering & Rehabilitation (JNER), 2024)