Supplemental material, New_supplementary_data for Effectiveness of electrical stimulation therapy in improving arm function after stroke: a systematic review and a meta-analysis of randomised controlled trials by Jheng-Dao Yang, Chun-De Liao, Shih-Wei Huang, Ka-Wai Tam, Tsan-Hon Liou, Yu-Hao Lee, Chia-Yun Lin and Hung-Chou Chen in Clinical Rehabilitation