1. Measuring quality of life: risks and benefits;Schipper;Cancer Treatment Rep,1985
2. Measuring quality of life in cancer patients;Donovan;J Clin Oncol,1989
3. Quality of life research in oncology: past achievements and future priorities;Aaronson;Cancer,1991
4. Subjective evaluation in non-small cell lung cancer: comparison of Kamofsky performance status with a patient generated visual analogue scale measuring activity;Burke,1985
5. Development of specific instruments for subjective evaluation of patients with lung cancer: comparison of observer assessment with patient generated visual analogue scales (VAS);Monras,1985