RT Journal Article SR Electronic T1 Should wearing of cycle helmets become compulsory? JF Archives of Emergency Medicine JO Arch Emerg Med FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 62 OP 62 DO 10.1136/emj.10.1.62 VO 10 IS 1 A1 Worrell, J YR 1993 UL http://emj.bmj.com/content/10/1/62.abstract AB