Study	Reason for exclusion
Aamland 2012	Review.
ACTRN12615001176550	Wrong study design.
ACTRN12618000181202	Wrong study design.
Allen 2006	Wrong patient population.
Aybek 2013	Wrong study design.
Baker 2007	Review.
Baslet 2012	Review.
Behr 1996	No control group.
Bellamy 1989	No control group.
Berkwitz 1952	No control group.
Berney 2012	Wrong study design.
Bhattacharyya 1971	No control group.
Binzer 1997	No control group.
Bouchal 1991	Wrong study design.
Brand 2009	Review.
Brand 2012a	Review.
Brand 2012b	Review.
Brooks 2007a	Review.
Brooks 2007b	Review.
Cardenas 1986	No control group.
Carlson 2017	Review.
Carson 2012	Review.
Carter 1949	No control group.
Casacchia 1989	Wrong intervention.
Conwill 2014	Wrong study design.
Dahlhauser 2017	Wrong study design.
Deeley 2016	Wrong study design.
Delargy 1986	No control group.
Demartini 2014	Wrong study design.
Dickes 1974	No control group.
Diseth 2005	Review.
DRKS00007139	Wrong study design.
Dworetzky 2014	Review.
Egan 2015	Overview article.
Ellason 1997	No control group.
Escobar 2007	Wrong patient population.
EUCTR2008 004167‐19‐NL	Wrong study design.
Fackler 1997	No control group.
Feinstein 2011	Wrong study design.
Fritzsche 2004	Wrong patient population.
Garcin 2018	Overview article.
Gaynor 2009	Review.
Geetha 1980	Wrong study design.
Ghaffar 2017	Review.
Ghosh 2018	Wrong intervention.
Goldstein 2004	Wrong study design.
Gooch 1997	No control group.
Grattan‐Smith 1988	No control group.
Guida 1954	No control group.
Guimaraes 1979	Wrong study design.
Gyllensten 2003	Wrong patient population.
Gyllensten 2009	Wrong patient population.
Hafeiz 1980	No control group.
Halpern 1944	No control group.
Hilmarsdottir 2016	Review.
Hoedeman 2010	Review.
Hoogduin 1993	No control group.
Ilic 2005	Wrong study design.
ISRCTN51225587	Wrong intervention.
Kelley 2011	Wrong study design.
Koelen 2014	Review.
Kolk 2004	Wrong patient population.
Kompoliti 2015	Overview article.
Koufman 1982	No control group.
Kroenke 2007	Review.
Kroenke 2009	Review.
Krull 1990	No control group.
Kupper 1947	No control group.
Lampe 2008	Wrong patient population.
Lehmkuhl 1989	No control group.
Leslie 1988	No control group.
Lipsitt 2006	Overview article.
Margalit 2008	Wrong patient population.
Martlew 2009	Review.
Martlew 2014	Review.
Masiwal 2015	Wrong study design.
Mayor 2010	Wrong study design.
McCormack 2014	Wrong study design.
McKenzie 2010	Wrong study design.
Minnen 2016	Wrong patient population.
Moene 1998	Wrong study design.
Morriss 2006	Wrong patient population.
Myrick 2012	Wrong study design.
Myrick 2017	Wrong study design.
NCT00159965	Wrong intervention.
NCT00630981	Wrong study design.
NCT01422278	Wrong study design.
NCT01643161	Trial terminated.
NCT01778517	Trial terminated.
Nidich 2016	Wrong patient population.
Nielsen 2013	Review.
Nielsen 2016	Overview article.
NTR4496	Wrong study design.
O'Kearney 2001	Wrong patient population.
Payne 2010	Wrong patient population.
Perez 2016	Review.
Pollak 2014	Review.
Poole 2010	Review.
Powell 1998	Letter to the editor.
Pringsheim 2017	Review.
Pu 1986	No control group.
Puhakka 1988	Wrong patient population.
Ramani 1982	No control group.
Rampello 1996	Wrong intervention.
Rangaswami 1985	No control group.
Resick 2012	Wrong patient population.
Reuber 2007	Wrong study design.
Rosebush 2011	Overview article.
Rosendal 2007	Wrong patient population.
Ross 1998	Letter to the editor.
Rudegeair 2013	Review.
Russell 1950	No control group.
Saxe 2002	Wrong study design.
Scallet 1976	Wrong intervention.
Schade 2011	Wrong patient population.
Schilte 2001	Wrong study design.
Schonenberg 2015	Wrong intervention.
Schweden 2016	Wrong patient population.
Shapiro 1997	No control group.
Shapiro 2004a	No control group.
Shapiro 2004b	Wrong study design.
Sharpe 2011	Wrong patient population.
Shokrolahi 2017	Wrong study design.
Silberg 1996	Book chapter.
Speed 1996	Wrong study design.
Stone 2010	Wrong study design.
Stone 2014a	Review.
Stone 2014b	Letter to the editor.
Stone 2015	Review.
Stone 2016	Review.
Suzuki 1979	No control group.
Sveinsson 2009	Review.
Tazaki 2006	Review.
Terhune 2017	Wrong study design.
Thenganatt 2015	Overview article.
Tsui 2017	Overview article.
Turgay 1990a	No control group.
Turgay 1990b	Wrong study design.
Urbanek 2014	Wrong study design.
van Bokhoven 2009	Wrong intervention.
Watanabe 1998	No control group.
Wetzelaer 2014	Wrong patient population.
White 1988	No control group.
Williams 1979	No control group.
Wiseman 2015	Review.
Wolf 2016	Wrong patient population.
Yaskin 1936	No control group.
Zlotnick 1997	Wrong patient population.
Zonneveld 2009	Wrong patient population.
Zonneveld 2012	Wrong study design.