RESEARCH References 1. Centers for Disease Control and Prevention. Updated interim U.S. case cefinition of severe acute respiratory syndrome (SARS). [Accessed June 5, 2003]. Available from: URL: http://www.cdc.gov/ ncidod/sars/casedefinition.htm 2. Peiris JSM, Lai ST, Poon LLM, Guan Y, Yam LYC, Lim W, et al. Coronavirus as a possible cause of severe acute respiratory syndrome. Lancet 2003;361:1319–25. 3. Peiris JSM, Chu CM, Cheng VCC, Chan KS, Hung IFN, Poon LLN, et al. Clinical progression and viral load in a community outbreak of coronavirus-associated SARS pneumonia: a prospective study. Lancet 2003;361:1767–72. 4. Lee N, Hui D, Wu A, Chan P, Cameron P, Joynt GM, et al. A major outbreak of severe acute respiratory syndrome in Hong Kong. N Engl J Med 2003;348:1986–94. 5. Booth CM, Matukas LM, Tomlinson GA, Rachlis AR, Rose DB, Dwosh HA, et al. Clinical features and short-term outcomes of 144 patients with SARS in the greater Toronto area. JAMA 2003;289:2801–9. 6. World Health Organization. Severe acute respiratory syndrome— Press briefing. (Wednesday, 16 April, 13:30 Palais des Nations). Available from: URL: http://www.who.int/csr/sars/2003_04_16/en/ 7. World Health Organization. Recommendations for laboratories test- ing by RT-PCR for presence of SARS coronavirus -RNA. [Accessed April 29, 2003]. Available from: URL: http://www.who.int/csr/sars/ coronarecommendations/en/ 8. World Health Organization. Sampling for severe acute respiratory syndrome (SARS) diagnostic tests. [Accessed April 29, 2003]. Available from: URL: http://www.who.int/csr/sars/sampling/en/ #sampling Address for correspondence: S.T. Lai, Department of Medicine and Geriatrics, Princess Margaret Hospital, Lai King, Kowloon, Hong Kong; fax: 852-29903333; email: lstpmh@netvigator.com All material published in Emerging Infectious Diseases is in the public domain and may be used and reprinted without special per- mission; proper citation, however, is appreciated. Search past issues of EID at www.cdc.gov/eid Emerging Infectious Diseases • www.cdc.gov/eid • Vol. 9, No. 11, November 2003 1387