1. United States of America (2016). United States copyright law. Available at
https://www.copyright.gov/title17/title17.pdf
. Accessed 2017/08/04.
2. Berne Convention for the Protection of Literary and Artistic Work, September 9, 1886, as revised at Paris on July 24, 1971 and amended in 1979 (1989). United Nation Treaty Series, 1161 (I-18838) 3–74. Resource document United Nations. Available at
https://treaties.un.org/doc/Publication/UNTS/Volume%201161/volume-1161-I-18338-English.pdf
. Accessed 2017/08/04.
3. US Department of Health, Food and Drug Administration. Patient-reported outcome measures: Use in medical product development to support labeling claims. Fed Regist. 2009;74(35):65132–3 Resource document Food and Drug Administration. Available at
http://www.fda.gov/downloads/Drugs/GuidanceComplianceRegulatoryInformation/Guidances/UCM193282.pdf
. Accessed 2017/08/04.
4. European Medicines Agency. Reflection paper on the regulatory guidance for the use of health-related quality of life (HRQL) measures in the evaluation of medicinal products. London: European Medicines Agency. Resource document European Medicines Agency; 2005. Available at
https://www.ema.europa.eu/documents/scientific-guideline/reflection-paper-regulatory-guidance-use-healthrelated-qualitylife-hrql-measures-evaluation_en.pdf
. Accessed 2017/08/04
5. Anfray C, Emery MP, Conway K, Acquadro C. Questions of copyright. Health Qual Life Outcomes. 2012;10:16.