(No Date) Available at: http://kingrichiespizza.com/wp-content/uploads/2014/05/Salad.jpeg (Accessed: 9 June 2016a).
(No Date) Available at: http://thumb9.shutterstock.com/display_pic_with_logo/622783/266988212/stock-photo-sick-old-man-suffering-from-heart-attack-or-breathing-difficulties-266988212.jpg (Accessed: 9 June 2016b).
(No Date) Available at: http://healthguideline.com/wp-content/uploads/2016/01/chest-pain.jpg (Accessed: 9 June 2016c).