To, K. K., Chan, J. F., Chen, H., Li, L., & Yuen, K. (2013). The emergence of influenza A H7N9 in human beings 16 years after influenza A H5N1: A tale of two cities. Lancet Infect Dis.

To, Kelvin KW, Jasper FW Chan, Honglin Chen, Lanjuan Li, und Kwok-Yung Yuen. "The Emergence of Influenza A H7N9 in Human Beings 16 Years After Influenza A H5N1: A Tale of Two Cities." Lancet Infect Dis 2013.

To, Kelvin KW, et al. "The Emergence of Influenza A H7N9 in Human Beings 16 Years After Influenza A H5N1: A Tale of Two Cities." Lancet Infect Dis 2013.