RT Journal Article SR Electronic T1 Early sport specialisation, does it lead to long-term problems? 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 1060 OP 1061 DO 10.1136/bjsports-2012-092005 VO 47 IS 17 A1 A Mehran Mostafavifar A1 Thomas M Best A1 Greg D Myer YR 2013 UL http://bjsm.bmj.com/content/47/17/1060.abstract AB