RT Journal Article SR Electronic T1 An 11-year-old high-level competitive gymnast with back pain 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 929 OP 932 DO 10.1136/bjsports-2011-090647 VO 47 IS 14 A1 Charlotte Nusman A1 Rick van Rijn A1 Liesbeth Lim A1 Mario Maas YR 2013 UL http://bjsm.bmj.com/content/47/14/929.abstract AB