RT Journal Article SR Electronic T1 Carefully executed studies of illness in elite sport: still room to improve methods in at least five ways 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 773 OP 774 DO 10.1136/bjsports-2016-096411 VO 50 IS 13 A1 Hilde Moseby Berge A1 Ben Clarsen YR 2016 UL http://bjsm.bmj.com/content/50/13/773.abstract AB