_{References:
(1)American Lung Association. (2016). Five Facts You Should Know About Pneumonia. [online] Available here(opens in a new tab)  [Accessed 31 Mar. 2017].
(2) Anon, (2015). Top 20 Pneumonia Facts—2015. [online] Available here(opens in a new tab)  [Accessed 31 Mar. 2017].}