References
- Waldron D, O’Boyle CA, Kearney M, Moriarty M, Carney D. Quality-of-life measurement in advanced cancer: Assessing the individual. J Clin Oncol 1999; 17: 3603–3611.
- Neudert C, Wasner M, Borasio GD. Patients’ assessment of quality of life instruments: a randomised study of SIP, SF-36 and SEIQoL-DW in patients with amyotrophic lateral scler- osis. J Neurol Sci 2001; 191: 103–109.
- Jenkinson C, Levvy G, Fitzpatrick R, Garratt A. The amyo- trophic lateral sclerosis assessment questionnaire (ALSAQ- 40): tests of data quality, score reliability and response rate in a survey of patients. J Neurol Sci 2000; 180: 94–100.