Comparative Study
The pain disability questionnaire: a new psychometrically sound measure for chronic musculoskeletal disorders.
Spine. 2004 Oct 15;29(20):2290-302; discussion 2303.
Multicenter Study
The utility of somatic items in the assessment of depression in patients with chronic pain: a comparison of the Zung Self-Rating Depression Scale and the Depression Anxiety Stress Scales in chronic pain and clinical and community...
Clin J Pain. 2005 Jan 1; 21 (1): 91-100.
Multicenter Study
Reliability and validity of the Korean version of the Impact of Event Scale-Revised.
Compr Psychiatry. 2009 Jul 1;50(4):385-90.