@misc{8946,
  author = {A. Matthews and S. Langan and I. Douglas and L. Smeeth and K. Bhaskaran},
  title = {Phosphodiesterase Type 5 Inhibitors and Risk of Malignant Melanoma: Matched Cohort Study Using Primary Care Data from the UK Clinical Practice Research Datalink},
  year = {2016},
  journal = {PLoS Med},
  volume = {13},
  number = {6},
  pages = {e1002037},
  issn = {1549-1277},
  doi = {10.1371/journal.pmed.1002037},
}