To cite package ‘codexcopd’ in publications use:

Kazemi A, Adibi A (2020). codexcopd: The CODEX (Comorbidity, Obstruction, Dyspnea, and Previous Severe Exacerbations) Index: Short and Medium-Term Prognosis in Patients Hospitalized for Chronic Obstructive Pulmonary Disease (COPD) Exacerbations. R package version 0.1.0, https://CRAN.R-project.org/package=codexcopd.

Corresponding BibTeX entry:

  @Manual{,
    title = {codexcopd: The CODEX (Comorbidity, Obstruction, Dyspnea,
      and Previous Severe Exacerbations) Index: Short and Medium-Term
      Prognosis in Patients Hospitalized for Chronic Obstructive
      Pulmonary Disease (COPD) Exacerbations},
    author = {Aida Kazemi and Amin Adibi},
    year = {2020},
    note = {R package version 0.1.0},
    url = {https://CRAN.R-project.org/package=codexcopd},
  }