1. World Health Organization. Epidemiology of WHO-confirmed human cases of avian influenza A (H5N1) infection. Wkly Epidemiol Rec. 2006;81:249–57.
2. World Health Organization. Confirmed Human Cases of Avian Influenza A (H5N1). Available at: http://www.who.int/csr/disease/avian_influenza/country/en/ (2010).
3. World Health Organization. Summary of human infection with highly pathogenic avian influenza A (H5N1) virus reported to WHO, January 2003–March 2009: cluster-associated cases. Wkly Epidemiol Rec. 2009;85:13–20.
4. World Health Organization. Update: WHO-confirmed human cases of avian influenza A (H5N1) infection, November 2003–May 2008. Wkly Epidemiol Rec. 2008;83:415–20.
5. Kawachi S, Luong ST, Shigematsu M, Furuya H, Phung TT, Phan PH, Nunoi H, Nguyen LT, Suzuki K. Risk parameters of fulminant acute respiratory distress syndrome and avian influenza (H5N1) infection in Vietnamese children. J Infect Dis. 2009;200:510–5.