Study	Reason for exclusion
Abdul Ghani 1989	Insufficient information to calculate diagnostic test accuracy.
Al Quorain 1996	Inappropriate reference standard.
Alhayaf 2008	Insufficient information to calculate diagnostic test accuracy.
Almersjo 1966	Inappropriate reference standard.
Ang 2007	Inappropriate reference standard.
Ashton 1998	Inappropriate reference standard.
Askew 1992	Inappropriate reference standard.
Aubertin 1995	Insufficient information to calculate diagnostic test accuracy.
Aubertin 1996	Inappropriate reference standard.
Azary 2011	Inappropriate reference standard.
Barkun 1993	Inappropriate reference standard.
Barr 1999	Inappropriate reference standard.
Barteau 1995	Inappropriate reference standard.
Beliveau 1964	Inappropriate reference standard.
Bennion 2002	Inappropriate reference standard.
Berci 1994	Insufficient information to calculate diagnostic test accuracy.
Berdah 2001	Inappropriate reference standard.
Bergamaschi 1999	Inappropriate reference standard.
Bodula 2011	Inappropriate reference standard.
Bokobza 1988	Not a diagnostic test accuracy study.
Bornman 1981	Inappropriate reference standard.
Bostanci 2003	Unable to obtain this article.
Buckley 1987	Inappropriate reference standard.
Calero Ayala 1983	Insufficient information to calculate diagnostic test accuracy.
Canto 1995	Insufficient information to calculate diagnostic test accuracy.
Cariani 2006	Inappropriate reference standard.
Carroll 1996	Inappropriate reference standard.
Catheline 1997	Inappropriate reference standard.
Catheline 2000	Inappropriate reference standard.
Catheline 2002	Inappropriate reference standard.
Chaib 1990	Inappropriate reference standard.
Chattopadhyay 1992	Insufficient information to calculate diagnostic test accuracy.
Chen 1993	Inappropriate reference standard.
Chen 2012	Not a diagnostic test accuracy study.
Chernev 2001	Inappropriate reference standard.
Chodoff 1960	Insufficient information to calculate diagnostic test accuracy.
Chowdhury 1999	Insufficient information to calculate diagnostic test accuracy.
Coppola 2001	Inappropriate reference standard.
Corff 1957	Inappropriate reference standard.
Csendes 1998	Inappropriate reference standard.
Cwik 2003	Unable to obtain this article.
Dalton 2005	Inappropriate reference standard.
de Dios Vega 1982	Insufficient information to calculate diagnostic test accuracy.
Derodra 1986	Not a diagnostic test accuracy study.
di Angelo 2010	Insufficient information to calculate diagnostic test accuracy.
di Angelo 2011	Insufficient information to calculate diagnostic test accuracy.
Diez 2000	Inappropriate reference standard.
Duchmann 1999	Insufficient information to calculate diagnostic test accuracy.
Elizondo 1989	Insufficient information to calculate diagnostic test accuracy.
Endo 2007	Inappropriate reference standard.
Endo 2011	Inappropriate reference standard.
Eshghi 2008	Insufficient information to calculate diagnostic test accuracy.
Familiari 2004	Inappropriate reference standard.
Famos 1990	Inappropriate reference standard.
Faris 1975	Inappropriate reference standard.
Farrands 1982	Insufficient information to calculate diagnostic test accuracy.
Fiore 1997	Insufficient information to calculate diagnostic test accuracy.
Flowers 1992	Inappropriate reference standard.
Friedrichs 1981	Not a diagnostic test accuracy study.
Garcia‐Caballero 1994	Inappropriate reference standard.
Geron 1999	Inappropriate reference standard.
Goletti 1995	Insufficient information to calculate diagnostic test accuracy.
Gregg 1979	Inappropriate reference standard.
Griffin 2003	Inappropriate reference standard.
Grundy 1972	Inappropriate reference standard.
Hammarstrom 1996	Inappropriate reference standard.
Hoyuela 1999	Inappropriate reference standard.
Huddy 1989	Inappropriate reference standard.
Huynh 1996	Insufficient information to calculate diagnostic test accuracy.
Ijzermans 1989	Inappropriate reference standard.
Jakimowicz 1987	Inappropriate reference standard.
Joyce 1991	Insufficient information to calculate diagnostic test accuracy.
Karakan 2009	Inappropriate reference standard.
Kent 1994	Insufficient information to calculate diagnostic test accuracy.
Kielar 2005	Inappropriate reference standard.
Kitahama 1986	Inappropriate reference standard.
Kruis 1997	Inappropriate reference standard.
Kullman 1984	Inappropriate reference standard.
Kushnirenko 1988	Insufficient information to calculate diagnostic test accuracy.
Lakoma 1996	Inappropriate reference standard.
Lane 1982	Inappropriate reference standard.
Ledniczky 2006	Inappropriate reference standard.
Lenriot 1993	Insufficient information to calculate diagnostic test accuracy.
Lim 2003	Inappropriate reference standard.
Lin 1997	Inappropriate reference standard.
Linghu 2004	Inappropriate reference standard.
Liu 2005	Inappropriate reference standard.
Lomanto 1999	We were unable to obtain this article.
Low 1992	Inappropriate reference standard.
Machi 1999	Inappropriate reference standard.
Macmahon 1993	Inappropriate reference standard.
Madhavan 1995	Insufficient information to calculate diagnostic test accuracy.
Mala 2000	Insufficient information to calculate diagnostic test accuracy.
Matzen 1981	Insufficient information to calculate diagnostic test accuracy.
McCormick 1974	Inappropriate reference standard.
Meduri 1998	Inappropriate reference standard.
Miao 2008	Insufficient information to calculate diagnostic test accuracy.
Mlynek 1971	Insufficient information to calculate diagnostic test accuracy.
Moon 2005	Inappropriate reference standard.
Nataly 2002	Insufficient information to calculate diagnostic test accuracy.
Neitlich 1997	Inappropriate reference standard.
Neoptolemos 1986a	Inappropriate reference standard.
Neoptolemos 1986b	Inappropriate reference standard.
Neri 2000	Inappropriate reference standard.
Nevah 2011	Insufficient information to calculate diagnostic test accuracy.
Nickkholgh 2006	Inappropriate reference standard.
Nies 1997	Inappropriate reference standard.
Oconnor 1986	Insufficient information to calculate diagnostic test accuracy.
Ohtani 1997	Insufficient information to calculate diagnostic test accuracy.
Osnes 1978	Insufficient information to calculate diagnostic test accuracy.
Pamos 2003	Inappropriate reference standard.
Pasanen 1993	Insufficient information to calculate diagnostic test accuracy.
Pasanen 1994	Inappropriate reference standard.
Polat 2000	Inappropriate reference standard.
Polkowski 2001	Insufficient information to calculate diagnostic test accuracy.
Potashov 1987	Inappropriate reference standard.
Puri 2012	Insufficient information to calculate diagnostic test accuracy.
Rahman 2010	Inappropriate reference standard.
Rijna 2000	Insufficient information to calculate diagnostic test accuracy.
Rives 1981	Insufficient information to calculate diagnostic test accuracy.
Robinson 1995	Insufficient information to calculate diagnostic test accuracy.
Rogers 2010	Insufficient information to calculate diagnostic test accuracy.
Roig 1995	Insufficient information to calculate diagnostic test accuracy.
Romano 2002	Insufficient information to calculate diagnostic test accuracy.
Sauerbruch 1979	Inappropriate reference standard.
Schulenburg 1969	Insufficient information to calculate diagnostic test accuracy.
Shafiq 2003	Insufficient information to calculate diagnostic test accuracy.
Shah 2011	Inappropriate reference standard.
Sheen‐Chen 1990	We were unable to obtain this article.
Siddiqui 1994	Insufficient information to calculate diagnostic test accuracy.
Sigel 1982	Inappropriate reference standard.
Sikic 1996	Insufficient information to calculate diagnostic test accuracy.
Singh 2000	Inappropriate reference standard.
Skorka 1982	Inappropriate reference standard.
Snow 2001	Inappropriate reference standard.
Stiris 2000	Insufficient information to calculate diagnostic test accuracy.
Stuart 1998	Inappropriate reference standard.
Tobin 1984	Insufficient information to calculate diagnostic test accuracy.
Ueno 1997	Insufficient information to calculate diagnostic test accuracy.
Videhult 2009	Inappropriate reference standard.