of the Environmental Mutagen Society and on the Board of Directors of the American Association for Cancer Research. He has served as a managing editor for Mutation Research and is currently a member of the Board of Reviewing Editors for Science. He serves on numerous advisory boards including that of the Fogarty International Center (NIH), the Office of Environmental Health Hazard Assessment (California EPA), and the toxicology advisory committee for the Burroughs-Welcome Fund. Dr. Hanawalt's specialty is photobiology and DNA repair, having co-discovered excision-repair and more recently the pathway of transcription-coupled repair. He has received an outstanding investigator award from the National Cancer Institute and in 1989 was elected to the National Academy of Sciences. He is presently a member of the Board on Radiation Effects Research in the National Research Council.
GEOFFREY R. HOWE is Professor of Public Health and Head, Division of Epidemiology at Columbia University School of Public Health. Dr. Howe earned his Ph.D. degree from the University of Leicester. He was formerly professor at the University of Toronto and Director of the National Cancer Institute of Canada Epidemiology Unit. He is a member of the National Commission for Radiological Protection and measurements and served as consultant or member on the last three BEIR Committees. He is a member of the editorial boards of Cancer Causes and Control and Cancer Epidemiology, Biomarkers and Prevention . Dr. Howe's radiation studies include those of tuberculosis patients exposed to low-LET radiation, miners exposed to radon, nuclear workers, and the National Cancer Institute sponsored studies of the consequences of the Chernobyl accident. He has acted as an adviser to the World Health Organization with respect to Chernobyl studies and serves on the Department of Energy's scientific review group for the latter's joint American/Russian radiation studies.
ALBRECHT M. KELLERER is the Director of the Radiobiological Institute of the University of Munich and of the Institute of Radiation Biology of the GSF, National Research Center for Environment and Health. He was formerly professor of radiation biophysics at Columbia University in New York, and subsequently professor and chief of the Institute for Medical Radiation Research at the University of Wurzburg. Dr. Kellerer's research specialties include microdosimetry, radiation risk assessment, and radiobiology. Dr. Kellerer is a member of the German National Commission for Radiation Protection, chairman of its committee for risk assessment and a member of committees of the ICRU and the International Commission on Radiological Protection. Dr. Kellerer is also the managing editor of the Journal of Radiation and Environmental Physics.
CHARLES E. LAND is a statistician at the National Cancer Institute's Radiation Epidemiology Branch. His research interests include radiation carcinogenesis and statistical methods. In addition to the NCI, Dr. Land has worked for organizations such as Los Alamos Scientific Laboratory, Bell Telephone Laboratories, and the Atomic Bomb Casualty Commission. Dr. Land has received scientific recognition for his work and is a member of numerous professional societies such as the Radiation Research Society, the American College of Epidemiology, and the American Society for the Advancement of Science.