1[1]Update: outbreak of severe acute respiratory syndrome- worldwide, 2003.MMWR Morb Mort Wkly Rep, 2003,52:241
2[2]Ksiazek TG, Erdman D, Goldsmith C, et al. A novel coronavirus associated with severe acute respiratory syndrome. www. nejm. org on April 10, 2003/04/14
3[3]Update 31 - Coronavirus never before seen in humans is the cause of IAP.www. who. int. 2003-04-16