RT Journal Article SR Electronic T1 Mass ECG screening of young athletes 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 707 OP 708 DO 10.1136/bjsm.2008.048843 VO 42 IS 9 A1 Roy J Shephard YR 2008 UL http://bjsm.bmj.com/content/42/9/707.abstract AB