Study	Reason for exclusion
Austin et al., 1999	Review
Bisson et al., 2004	Adulthood
Brill et al., 2001	Review
Bronchard et al., 2001	Review
Bryant et al., 1998	Adulthood
Bryant et al., 2005	Adulthood
Brymer et al., 2009	Review
Caffo & Belaise, 2003	Review
Casswell, 1997	Unsatisfactory methodological quality
Catani et al., 2009	Typ II Trauma
Chapman et al., 2001	Unsatisfactory methodological quality
Chemtob et al., 2002	no brief early intervention (intervention more than 6 weeks after the event or more than 6 intervention sessions)
Cohen et al., 2010	Review
Cohen, J., 2003	Review
Espie, 2009	no brief early intervention (intervention more than 6 weeks after the event or more than 6 intervention sessions)
Foa et al, 2006	Adulthood
Fremont, 2004	Review
Galante & Foa, 1986	no brief early intervention (intervention more than 6 weeks after the event or more than 6 intervention sessions)
Giannopoulou et al., 2006	no brief early intervention (intervention more than 6 weeks after the event or more than 6 intervention sessions)
Gidron et al., 2001	Adulthood
Goenjian et al., 1997	no brief early intervention (intervention more than 6 weeks after the event or more than 6 intervention sessions)
Grant et al., 1997	No Intervention
Hoagwood, 2007	no brief early intervention (intervention more than 6 weeks after the event or more than 6 intervention sessions)
Klingmann, 1987	Unsatisfactory methodological quality
La Greca & Silverman, 2009	Review
Litz & Maguen, 2007	Review
Math et al, 2008	no brief early intervention (intervention more than 6 weeks after the event or more than 6 intervention sessions)
Nagao et al., 1995	not in english
Nagao et al., 2001	not in english
Okuno et al, 2001	not in english
Poijula et al., submitted	Unsatisfactory methodological quality
Poijula et al., 2001b	same sample as included study
Pynoos & Eth, 1986	Unsatisfactory methodological quality
Pynoos & Nader, 1988	Review
Rivlin, E., 1988	Review
Roberts et al, 2009	Review
Salcioglu & Basoglu, 2008	No brief early intervention (intervention more than 6 weeks after the event or more than 6 intervention sessions)
Schreier et al., 2005	Unsatisfactory methodological quality
Silverman et al., 2008	Review
Stuber et al., 2002	Unsatisfactory methodological quality
Vila et al., 1999	Unsatisfactory methodological quality
Yule & Udwin, 1991	Same sample as included study