@article{xie_ge_huang_zhu_yang_zhou_qu_guo_2026,  title={A novel machine learning model of smartphone-based 1-minute sit-to-stand test for prediction of six-minute walk test distance in patients with COPD},  volume={81},  ISSN={1807-5932},  url={https://doi.org/10.1016/j.clinsp.2026.100923},  DOI={10.1016/j.clinsp.2026.100923},  journal={Clinics},  publisher={Faculdade de Medicina / USP},  author={Xie, Simin and Ge, Xiao and Huang, Lin and Zhu, Wenyu and Yang, Yue and Zhou, Min and Qu, Jieming and Guo, Yi},  year={2026},  pages={100923} }