Study	Reason for exclusion
Baek 2007	Non‐randomised study
Bradley 2006	Only participants with craniosynostotic syndromes and midface hypoplasia were operated on – no cleft patients
Cheung 2006b	Cleft versus non‐cleft patients in a non‐randomised design
Cheung 2008	A narrative review of other published studies
Daimaruya 2010	Controlled clinical trial, but non‐randomised
Harada 2002	Controlled clinical trial, but non‐randomised
Harada 2004	Cleft versus non‐cleft patients in a non‐randomised design
Rachmiel 2007	A discussion paper and not a clinical trial