PT - JOURNAL ARTICLE AU - B. Ryan TI - Emergency Radiology AID - 10.1136/emj.6.4.280 DP - 1989 Dec 01 TA - Archives of Emergency Medicine PG - 280--280 VI - 6 IP - 4 4099 - http://emj.bmj.com/content/6/4/280.short 4100 - http://emj.bmj.com/content/6/4/280.full SO - Arch Emerg Med1989 Dec 01; 6