Dr. Crespi is Professor of Biostatistics at the Fielding School of Public Health at University of California Los Angeles, where she is also affiliated with the UCLA Jonsson Comprehensive Cancer Center. Dr. Crespi has published widely in the areas of cancer, obesity and chronic disease. Her statistical methodology interests include design and analysis of randomized trials and longitudinal modeling of chronic disease processes. Dr. Crespi is past president of the Western North American Region of the International Biometric Society and on the editorial board of the Journal of the National Cancer Institute. She has a forthcoming book on sample size and power calculation methods.