A cross-sectional cohort study of speech in five-year-olds with cleft palate ± lip to support development of national audit standards: benchmarking speech standards in the United Kingdom. - Britton L; Albery L; Bowden M; Harding-Bell A; Phippen G; Sell D (The Cleft palate-craniofacial journal : official publication of the American Cleft Palate-Craniofacial Association, 2014)