@misc{7699,
  author = {E. Powell and I. Douglas and U. Gungabissoon and L. Smeeth and K. Wing},
  title = {Real-world effects of medications for stroke prevention in atrial fibrillation: protocol for a UK population-based non-interventional cohort study with validation against randomised trial results},
  year = {2021},
  journal = {BMJ Open},
  volume = {11},
  number = {4},
  pages = {e042947},
  issn = {2044-6055},
  doi = {10.1136/bmjopen-2020-042947},
}