RT Journal Article SR Electronic T1 Arterial blood gases made easy JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 66 OP 68 DO 10.7861/clinmedicine.14-1-66 VO 14 IS 1 A1 Graham P Burns YR 2014 UL http://www.rcpjournals.org/content/14/1/66.abstract