Andrew Lawson, Department of Epidemiology and Biostatistics, University of South Carolina, USAAndrew has published many papers in leading journals, and a number of books on spatial statistics, including four for Wiley. Ken Kleinman, Department of Ambulatory Care and Prevention, Harvard Medical School, Boston, USAKen is an epidemiologist who specializes in disease surveillance, and has recently worked on projects modeling the spread of anthrax following a potential terrorist attack.