RT Journal Article SR Electronic T1 Parent-reported sleep-disordered breathing symptoms early in life predict childhood behavioural problems at age 4 and 7 years JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 77 OP 78 DO 10.1136/eb-2012-100821 VO 18 IS 2 A1 Alice M Gregory A1 Luci Wiggs YR 2013 UL http://ebm.bmj.com/content/18/2/77.abstract AB