TY - STAND AU - E. Powell AU - I. Douglas AU - U. Gungabissoon AU - L. Smeeth AU - K. Wing BT - BMJ Open DO - 10.1136/bmjopen-2020-042947 M1 - 4 PY - 2021 EP - e042947 T2 - BMJ Open TI - 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 VL - 11 SN - 2044-6055 ER -