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17.10  References

Alonso-Coello 2006  
Alonso-Coello P, Zhou Q, Martinez-Zapata MJ, Mills E, Heels-Ansdell D, Johanson JF, Guyatt G. Meta-analysis of flavonoids for the treatment of haemorrhoids. British Journal of Surgery 2006; 93: 909-920.

Cohen 1988  
Cohen J. Statistical Power Analysis in the Behavioral Sciences (2nd edition). Hillsdale (NJ): Lawrence Erlbaum Associates, Inc., 1988.

Guyatt 1993  
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Guyatt 1997  
Guyatt GH, Naylor CD, Juniper E, Heyland DK, Jaeschke R, Cook DJ. Users' guides to the medical literature. XII. How to use articles about health-related quality of life. Evidence-Based Medicine Working Group. JAMA 1997; 277: 1232-1237.

Guyatt 2002  
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Guyatt 2004  
Guyatt G, Montori V, Devereaux PJ, Schünemann H, Bhandari M. Patients at the center: in our practice, and in our use of language. ACP Journal Club 2004; 140: A11-A12.

Lacasse 1996  
Lacasse Y, Wong E, Guyatt GH, King D, Cook DJ, Goldstein RS. Meta-analysis of respiratory rehabilitation in chronic obstructive pulmonary disease. The Lancet 1996; 348: 1115-1119.

Lohr 2002  
Lohr K. Assessing health status and quality-of-life instruments: attributes and review criteria. Quality of Life Research 2002; 11: 193-205.

Maciejewski 2005  
Maciejewski ML, Patrick DL, Williamson DF. A structured review of randomized controlled trials of weight loss showed little improvement in health-related quality of life. Journal of Clinical Epidemiology 2005; 58: 568-578.

Martinez-Devesa 2007  
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Norman 2003  
Norman GR, Sloan JA, Wyrwich KW. Interpretation of changes in health-related quality of life: the remarkable universality of half a standard deviation. Medical Care 2003; 41: 582-592.

Patrick 1993  
Patrick DL, Erickson P. Health Status and Health Policy: Quality of Life in Health Care Evaluation and Resource Allocation. New York (NY): Oxford University Press, 1993.

Puhan 2006  
Puhan M, Soesilo I, Guyatt GH, Schünemann HJ. Combining scores from different patient reported outcome measures in meta-analyses: when is it justified? Health and Quality of Life Outcomes 2006; 4: 94.

Rutten-van Mölken 1999  
Rutten-van Mölken M, Roos B, Van Noord JA. An empirical comparison of the St George's Respiratory Questionnaire (SGRQ) and the Chronic Respiratory Disease Questionnaire (CRQ) in a clinical trial setting. Thorax 1999; 54: 995-1003.

Schünemann 2003  
Schünemann HJ, Griffith L, Jaeschke R, Goldstein R, Stubbing D, Guyatt GH. Evaluation of the minimal important difference for the feeling thermometer and the St. George's Respiratory Questionnaire in patients with chronic airflow obstruction. Journal of Clinical Epidemiology 2003; 56: 1170-1176.

Schünemann 2005  
Schünemann HJ, Goldstein R, Mador MJ, McKim D, Stahl E, Puhan MA, Griffith LE, Grant B, Austin P, Collins R, Guyatt GH. A randomised trial to evaluate the self-administered standardised chronic respiratory questionnaire. European Respiratory Journal 2005; 25: 31-40.

Singh 2001  
Singh SJ, Sodergren SC, Hyland ME, Williams J, Morgan MD. A comparison of three disease-specific and two generic health-status measures to evaluate the outcome of pulmonary rehabilitation in COPD. Respiratory Medicine 2001; 95: 71-77.

Tarlov 1989  
Tarlov AR, Ware JE, Jr., Greenfield S, Nelson EC, Perrin E, Zubkoff M. The Medical Outcomes Study. An application of methods for monitoring the results of medical care. JAMA 1989; 262: 925-930.

US Food and Drug Administration 2006  
US Food and Drug Administration. Guidance for Industry. Patient-Reported Outcome Measures: Use in Medical Product Development to Support Labeling Claims [February 2006]. Available from: (accessed 1 January 2008).

Ware 1995  
Ware JE, Kosinski M, Bayliss MS, McHorney CA, Rogers WH, Raczek A. Comparison of methods for the scoring and statistical analysis of SF-36 health profile and summary measures: summary of results from the Medical Outcomes Study. Medical Care 1995; 33: AS264-AS279.

Zaza 2000  
Zaza S, Wright-De Agüero LK, Briss PA, Truman BI, Hopkins DP, Hennessy MH, Sosin DM, Anderson L, Carande-Kulis VG, Teutsch SM, Pappaioanou M, Task Force on Community Preventive Services. Data collection instrument and procedure for systematic reviews in the Guide to Community Preventive Services. American Journal of Preventive Medicine 2000; 18 (Suppl 1): 44-74.