@article{qiaojuan deng2023of,
  title={Incidence of frailty and construction of prediction model in elderly male patients with chronic obstructive pulmonary disease},
  author={kai chen,qiaojuan deng,yuejie guan,kaiwen zheng},
  journal={Journal of Men's Health},
  volume={19},
  number={10},
  pages={112--119},
  doi = {10.22514/jomh.2023.105},
  year={2023}
}