RT Journal Article SR Electronic T1 Relative Energy Deficiency in Sport (RED-S) 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 421 OP 423 DO 10.1136/bjsports-2014-094559 VO 49 IS 7 YR 2015 UL http://bjsm.bmj.com/content/49/7/421.abstract AB