To cite package ‘OPWeight’ in publications use:

  Hasan M, Schliekelman P (2017). _OPWeight: Optimal p-value weighting
  with independent information_. R package version 1.27.0,
  <https://bioconductor.org/packages/OPWeight>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {OPWeight: Optimal p-value weighting with independent information},
    author = {Mohamad Hasan and Paul Schliekelman},
    year = {2017},
    note = {R package version 1.27.0},
    url = {https://bioconductor.org/packages/OPWeight},
  }