RT Journal Article SR Electronic T1 Methods matter: pilot and feasibility studies in sports medicine JF British Journal of Sports Medicine JO Br J Sports Med FD BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine SP 1309 OP 1310 DO 10.1136/bjsports-2020-102631 VO 54 IS 22 A1 Michael J Campbell A1 Mohammad Ali Mansournia A1 Gillian Lancaster YR 2020 UL http://bjsm.bmj.com/content/54/22/1309.abstract AB