PT - JOURNAL ARTICLE ED - , TI - BET 3. NORMAL PARTIAL PRESSURE OXYGEN IN ROOM AIR AS A RULE-OUT FOR PULMONARY EMBOLISM AID - 10.1136/emj.2009.072124 DP - 2009 Apr 01 TA - Emergency Medicine Journal PG - 290--291 VI - 26 IP - 4 4099 - http://emj.bmj.com/content/26/4/290.short 4100 - http://emj.bmj.com/content/26/4/290.full SO - Emerg Med J2009 Apr 01; 26