Savill, N. J., D. J. Shaw, R. Deardon, M. J. Tildesley, M. J. Keeling, M. E. J. Woolhouse, S. P. Brooks, and B. T. Grenfell. 2007. Effect of data quality on estimates of farm infectiousness trends in the UK 2001 foot- and-mouth disease epidemic. J R Soc Interface 4:235-241.