ANDREW W. WOOD, PhD, is Professor of Biophysics, School of Health Sciences, Swinburne University of Technology, Melbourne, Australia. Dr. Wood has had many years' of involvement in various research projects on Non-ionizing Radiation and serving on committees dealing with Radiation Protection. KEN KARIPIDIS, PhD, is a senior scientist with the Radiation Health Services Branch, Australian Radiation Protection and Nuclear Safety Agency, Melbourne, Australia. Dr. Karipidis has been a member of various groups and committees providing advice to government and other stakeholders on radiation protection issues.