1. Thompson T, Todd RB. Annals of influenza, or, epidemic catarrhal fever in Great Britain from 1510 to 1837. London: Sydenham Society; 1852.
2. Assaad F, Cockburn WC, Sundaresan TK. Use of excess mortality from respiratory diseases in the study of influenza. Bull World Health Organ. 1973;49(3):219–33.
3. Fine MJ, Auble TE, Yealy DM, Hanusa BH, Weissfeld LA, Singer DE, et al. A prediction rule to identify low-risk patients with community-acquired pneumonia. N Engl J Med. 1997;336(4):243–50.
4. Lim WS, van der Eerden MM, Laing R, Boersma WG, Karalus N, Town GI, et al. Defining community acquired pneumonia severity on presentation to hospital: an international derivation and validation study. Thorax. 2003;58(5):377–82.
5. The Committee for the Japanese Respiratory Society Guidelines in the Management of Respiratory Infections. Guidelines for the management of community acquired pneumonia in adults, revised edition. Respirology. 2006;11(Suppl 3):S79–133.