1. World Health Organization: Life expectancy at birth (years) (2017).
http://www.gamapserver.who.int/gho/interactive_charts/mbd/life_expectancy/atlas.html
2. The World Bank: World health organization global health expenditure database (2018).
https://data.worldbank.org/indicator/SH.XPD.TOTL.ZS?end=2014&start=1995
3. Movassaghi, S., Abolhasan, M., Lipman, J., Smith, D., Jamalipour, A.: Wireless body area networks: a survey. IEEE Commun. Surv. Tutorials 16(3), 1658–1686 (2014)
4. Latré, B., Braem, B., Moerman, I., Blondia, C., Demeester, P.: A survey on wireless body area networks. Wirel. Netw. 17(1), 1–18 (2011)
5. IEEE: IEEE standard for local and metropolitan area networks - Part 15.4: Low-rate wireless personal area networks (LR-WPANs). IEEE Std (2011)