1. Organisation for Economic Co-operation and Development. Health spending (indicator). Available at: https://data.oecd.org/healthres/health-spending.htm. Accessed September 8, 2017.
2. Evolution and patterns of global health financing 1995-2014: development assistance for health, and government, prepaid private, and out-of-pocket health spending in 184 countries;Lancet,2017
3. What is value in health care?;Porter;N Engl J Med,2010
4. Innovation as discipline, not fad;Asch;N Engl J Med,2015
5. O'Connor C, Klebahn P. The strategic pivot: rules for entrepreneurs and other innovators. Harvard Business Review, February 28, 2011.