1. Molecular evolution of the SARS coronavirus during the course of the SARS epidemic in China;Science,2004
2. Update: Influenza activity–United States, 1999–2000 season;MMWR Morb Mortal Wkly Rep,2000
3. Seasonal patterns of invasive pneumococcal disease;Dowell;Emerg Infect Dis,2003
4. Epidemiology of rubella;Witte;Am J Dis Child,1969
5. Influenza surveillance in Singapore: 1972–86;Doraisingham;Bull World Health Organ,1988