bibliography.bib

@article{janssen2009dealing,
  title={Dealing with missing predictor values when applying clinical prediction models},
  author={Janssen, Kristel JM and Vergouwe, Yvonne and Donders, A Rogier T and Harrell Jr, Frank E and Chen, Qingxia and Grobbee, Diederick E and Moons, Karel GM},
  journal={Clinical chemistry},
  volume={55},
  number={5},
  pages={994--1001},
  year={2009},
  publisher={Oxford University Press}
}