References
- Younossi ZM, Guyatt G, Kiwi M, Boparai N, King D. Development of a disease specific questionnaire to measure health related quality of life in patients with chronic liver disease. Gut 1999;45:295–300.
- Hauser W, Schnur M, Steder-Neukamm U, Muthny FA, Grandt D. Validation of the German version of the chronic liver disease questionnaire. Eur J Gastroenterol Hepatol 2004;16:599–606.
- Ferrer M, Cordoba J, Garin O, Olive G, Flavia M, Vargas V, Validity of the Spanish version of the chronic liver disease questionnaire (CLDQ) as a standard outcome for quality of life assessment. Liver Transplant 2006;12:95–104.
- Ware JE Jr, Sherbourne CD. The MOS 36-item short-form health survey (SF-36). I. Conceptual framework and item selection. Med Care 1992;30:473–83.
- Zigmond AS, Snaith RP. The hospital anxiety and depression scale. Acta Psychiatr Scand 1983;67:361–70.
- Dimenäs E, Glise H, Hallerbäck B, Hernqvist H, Svedlund J, Wiklund I. Quality of life in patients with upper gastrointestinal symptoms. An improved evaluation of treatment regimens? Scand J Gastroenterol 1993;28:681–7.
- Fisk JD, Ritvo PG, Ross L, Haase DA, Marrie TJ, Schlech WF. Measuring the functional impact of fatigue: initial validation of the fatigue impact scale. Clin Infect Dis 1994;18(Suppl 1):S79–83.
- Scientific advisory committee of the medical outcomes trust. Assessing health status and quality of life instruments: attributes and review criteria. Qual Life Res 2002;11:193–205.