RT Journal Article SR Electronic T1 The high altitude medical handbook JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 922 OP 922 DO 10.1136/emj.2004.014639 VO 22 IS 12 A1 F Bellis YR 2005 UL http://emj.bmj.com/content/22/12/922.2.abstract AB