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Lee, Vernon J., Jonathan Yap, Jimmy B. S. Ong, Kwai-Peng Chan, Raymond T. P. Lin, Siew Pang Chan, Kee Tai Goh, Yee-Sin Leo, and Mark I-Cheng Chen. Influenza Excess Mortality From 1950–2000 in Tropical Singapore. Public Library of Science, 2009.

Lee, Vernon J., et al. Influenza Excess Mortality From 1950–2000 in Tropical Singapore. Public Library of Science, 2009.