PT - JOURNAL ARTICLE AU - J. D. Norval TI - Case reports. AID - 10.1136/bjsm.14.4.233 DP - 1980 Dec 01 TA - British Journal of Sports Medicine PG - 233--233 VI - 14 IP - 4 4099 - http://bjsm.bmj.com/content/14/4/233.1.short 4100 - http://bjsm.bmj.com/content/14/4/233.1.full SO - Br J Sports Med1980 Dec 01; 14