The Time Required to Estimate the Case Fatality Ratio of Influenza Using Only the Tip of an Iceberg: Joint Estimation of the Virulence and the Transmission Potential. - Keisuke Ejima; Ryousuke Omori; Benjamin J. Cowling; Kazuyuki Aihara; Hiroshi Nishiura (Comput. Math. Methods Medicine, 2012)