TY - JOUR T1 - Emergency Radiology JF - Archives of Emergency Medicine JO - Arch Emerg Med SP - 280 LP - 280 DO - 10.1136/emj.6.4.280 VL - 6 IS - 4 AU - B. Ryan Y1 - 1989/12/01 UR - http://emj.bmj.com/content/6/4/280.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -