1. Society IC. Evolution of intensive care in the UK. Available at: www.ics.ac.uk/downloads/history.pdf. Accessed July 16, 2006.
2. Society of Critical Care Medicine. History of critical care. Available at: http://www.sccm.org/SCCM/Patient-Family+Resources/History+of+Critical+Care/. Accessed July 16, 2006.
3. The first intensive care unit in the world: Copenhagen 1953;Berthelsen;Acta Anaesthesiol Scand,2003
4. Daily cost of an intensive care unit day: the contribution of mechanical ventilation;Dasta;Crit Care Med,2005
5. The changing epidemiology of mechanical ventilation: a population-based study;Carson;J Intensive Care Med,2006