RT Journal Article SR Electronic T1 Preventing gatekeeping delays in the diagnosis of rare diseases JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 145 OP 146 DO 10.3399/bjgp18X695225 VO 68 IS 668 A1 Esther de Vries A1 Lisa Fransen A1 Marlon van den Aker A1 Bert R Meijboom YR 2018 UL http://bjgp.org/content/68/668/145.abstract AB