Creators:Horton, Nicholas J. (Amherst College. Department of Mathematics and Statistics), Bell, Melanie L. (University of Sydney. Psycho-Oncology Co-operative Research Group), Kenward, Michael G., 1956- (London School of Hygiene & Tropical Medicine. Department of Medical Statistics), Fairclough, Diane Lynn (University of Colorado at Denver. Department of Preventive Medicine and Biometry)