[1] Univ Hosp Bristol NHS Fdn Trust, Natl Inst Hlth Res NIHR Biomed Res Unit Nutr Diet, Bristol, Avon, England
[2] Univ Bristol, Bristol, Avon, England
[3] Univ Bristol, Bristol Dent Sch, Bristol, Avon, England
[4] Univ Bristol, Sch Social & Community Med, Bristol, Avon, England
[5] Aston Univ, Life & Hlth Sci, Birmingham, W Midlands, England
[6] St Michaels Hosp, Childrens Hearing Ctr, Bristol, Avon, England
[7] Great Ormond St Hosp NHS Fdn Trust, North Thames Reg Cleft Serv, Speech & Language Therapy Dept, Ctr Outcomes & Experience Res Childrens Hlth Illn, London, England
[8] Cambridge Univ Hosp NHS Fdn Trust, Addenbrookes Hosp, Cleft NET East, Cambridge, England
[9] Cleft Lip & Palate Assoc, London, England
[10] North Bristol NHS Trust, Bristol Speech & Language Therapy Res Unit, Southmead Hosp, Bristol, Avon, England
[11] Helwan Univ, Dept Appl Stat, Cairo, Egypt