9Haag S, Senf W, Hauser W,et al. Impairment of health-related quality of life in functional dyspepsia and chronic liver disease : the influence of depression and anxiety. Aliment Pharmacol Ther, 2008,27: 561- 571.
10Luo X, Lynn George M, Kakouras I, el al. Reliability, validity, and responsiveness of the short form 12-item survey (SF-12) in patients with back pain. Spine,2003,8 : 1739-1745.
