1. Anderson, P., & Miller, D. (2015). Sweet policies. British Medical Journal, 350, h780.
2. Bundeszentrale fuer politische Bildung. (2013). Ausgaben für Gesundheit (Health care spending). http://www.bpb.de/nachschlagen/datenreport-2013/gesundheit-und-soziale-sicherung/173649/ausgaben-fuer-gesundheit . Last access 15 Nov 2015.
3. Dana, J. (2009). How psychological research can inform policies for dealing with conflicts of interest in medicine. In B. Lo & M. J. Fields (Eds.), Conflict of interest in medical research, education and practice (pp. 358–374). Washington, DC: National Academeis Press.
4. Eckardt, V. (2000). Complimentary journeys to the World Congress of Gastroenterology – An inquiry of potential sponsors and beneficiaries. Zeitschrift für Gastroenterologie, 38, 5–6.
5. Gornall, J. (2015). Sugar: Spinning a web of influence. British Medical Journal, 350, h231.