RT Journal Article SR Electronic T1 Individual clinical symptoms have limited utility in the diagnosis of obstructive sleep apnoea JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP e10 OP e10 DO 10.1136/eb-2013-101591 VO 19 IS 2 A1 Reena Mehra YR 2014 UL http://ebm.bmj.com/content/19/2/e10.abstract AB