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Physical domain of the Kihon Checklist: A possible surrogate for physical function tests

We thank Ling Siqi for the back-translation, He Wen, Chen Xiaowu, Li Yan, Ma Yue, Tao Yanling and Gao Yan for the semantic equivalence evaluation, Cheng Ye and Shen Ming for their contributions to the cultural adaptation. We also sincerely thank all the elderly participants in the pilot study. The study was funded by the Medical Science and Technology Research Fund of Guangdong Province (A2019067), and Natural Science Fund of Shenzhen University (2019126).