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. 2004 Apr 19;2004(2):CD004166. doi: 10.1002/14651858.CD004166.pub2
Study Reason for exclusion
Backous 1996 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ review article
Bader 1985 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ expert opinion
Bingham 1987 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ case series
Bull 1984 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ case series
Butt 1987 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ expert opinion
Cochran 1980 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ expert opinion
Davis 1971 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ review article
Dimeff 1989 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ expert opinion
Eichel 1978 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ expert opinion
El‐Silimy 1985 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ letter
Eliachar 1983 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ case series
Elsahy 2002 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ review article
Federspil 1970 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ case series
Gernon 1980 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ expert opinion
Giffin 1985 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ case series
Giffin 1992 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ review article
Gross 1978 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ expert opinion
Grosse 1991 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ expert opinion
Henderson 2000 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ case report
Holmes 1999 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ review article
Hwang 2001 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ animal study
Kelleher 1967 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ expert opinion
Kirsch 1991 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ review article
Koopmann 1979 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ expert opinion
Krucoff 1996 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ review article
Krugman 1989 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ case report
Lane 1998 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ expert opinion
Lee 1996 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ review article
Lee 1997 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ case report
Martin 2000 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ case report
Maurer 1990 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ review article
Nahl 1989 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ case series
O'Donnell 1999 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ case series
Parlette 1995 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ review article
Pinto 1978 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ case report
Punjabi 1997 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ review article
Quine 1996 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ expert opinion
Rotermundt 1976 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ review article
Savage 1981 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ expert opinion
Scarcella 1978 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ case report
Schuller 1989 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ case series
Spearing 1967 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ expert opinion
Starck 1992 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ expert opinion
Stiernberg 1986 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ review article
Stuteville 1969 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ expert opinion
Talaat 1985 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ case series
Templer 1990 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ review article
Unger 1970 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ case series
Vuyk 1991 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ expert opinion
Zohar 1990 ALLOCATION: 
 Not a randomised controlled trial, controlled clinical trial or cohort study ‐ letter