in 2015 by O’Connor & Casey
in 2015 by O’Connor & Casey
in 2012 by Butow et al.
in 2002 by Craig et al.
in 1948 by Karnofsky & Burchenal
in 1999 by Kroenke, Spitzer & Williams and General Anxiety Disorder (GAD-7) and in 2006 by Spitzer et al.
in 1983 by Cohen et al.
in 2016 by Riegel et al.
in 1996 by Ware et al.