1.
[6] Levit, K., Wier, L., Stranges, E., Ryan, K., Elixhauser, A.. (2007). HCUP facts and figures: Statistics on hospital-based care in the United States. Retrieved from: http://www.hcup-us.ahrq.gov/reports.jsp.
[7] Frank, S. M., Savage, W. J., Rothschild, J. A., Rivers, R. J., Ness, P. M., Paul, S. L., & Ulatowski, J. A. (2012). Variability in blood and blood component utilization as assessed by an anesthesia information management system. The Journal of the American Society of Anesthesiologists, 117(1), 99-106.
[8] Marik, P. E., Pastores, S. M., Annane, D., Meduri, G. U., Sprung, C. L., Arlt, W., ... & Tsagarakis, S. (2008). Recommendations for the diagnosis and management of corticosteroid insufficiency in critically ill adult patients: consensus statements from an international task force by the American College of Critical Care Medicine. Critical care medicine, 36(6), 1937-1949.