00522nas a2200205   4500000000100000000000100001008004100002100001500043700001400058700001400072700001600086700001900102700001400121700002100135700001200156245012000168300000700288490000700295022001400302       2021                            d1 aM. Persson1 aK. Harman1 aK. Thomas1 aJ. Chalmers1 aY. Vinogradova1 aS. Langan1 aJ. Hippisley-Cox1 aS. Gran00aUsing electronic health records to inform trial feasibility in a rare autoimmune blistering skin disease in England  a220 v21  a1471-2288