RT Journal Article SR Electronic T1 Spinal boards or vacuum mattresses for immobilisation JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 379 OP 380 DO 10.1136/emj.18.5.379 VO 18 IS 5 A1 Muhammad Ahmad A1 John Butler YR 2001 UL http://emj.bmj.com/content/18/5/379.abstract AB