Choosing pandemic parameters for pandemic preparedness planning: A comparison of pandemic scenarios prior to and following the influenza A(H1N1) 2009 pandemic - Charlie P. van der Weijden and Mart L. Stein and André J. Jacobi and Mirjam E. E. Kretzschmar and Ralf Reintjes and Jim E. van Steenbergen and Aura Timen (Health policy : affiliated with the European Health Policy Forum, 2012)