RT Journal Article SR Electronic T1 Clinical and scientific letters: The national early warning score gives misleading scores for oxygen saturation in patients at risk of hypercapnia JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 98 OP 98 DO 10.7861/clinmedicine.15-1-98a VO 15 IS 1 A1 B Ronan O’Driscoll A1 Kirstie Grant A1 Darren Green A1 Simon Edeghere A1 Nawar Diar Bakerly A1 Peter Murphy A1 Val Edwards A1 Peter M Turkington YR 2015 UL http://www.rcpjournals.org/content/15/1/98.2.abstract AB