RT Journal Article SR Electronic T1 The challenges of understanding differential attainment in postgraduate medical education JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 544 OP 545 DO 10.3399/bjgp19X706241 VO 69 IS 688 A1 Yiting Lu YR 2019 UL http://bjgp.org/content/69/688/544.2.abstract AB