To cite PatientLevelPrediction in publications use:

  Reps JM, Schuemie MJ, Suchard MA, Ryan PB, Rijnbeek P (2018). “Design
  and implementation of a standardized framework to generate and
  evaluate patient-level prediction models using observational
  healthcare data.” _Journal of the American Medical Informatics
  Association_, *25*(8), 969-975.
  <https://doi.org/10.1093/jamia/ocy032>.

A BibTeX entry for LaTeX users is

  @Article{,
    author = {J. M. Reps and M. J. Schuemie and M. A. Suchard and P. B. Ryan and P. Rijnbeek},
    title = {Design and implementation of a standardized framework to generate and evaluate patient-level prediction models using observational healthcare data},
    journal = {Journal of the American Medical Informatics Association},
    volume = {25},
    number = {8},
    pages = {969-975},
    year = {2018},
    url = {https://doi.org/10.1093/jamia/ocy032},
  }
