1. D. C. M. Gersons-Wolfensberger, MD, is a scientific secretary at the Health Council of the Netherlands. Her interest is in topics on the interface of medicine and society. She has worked on school health care, home care, quality and allocation of care in oncology, and dyslexia. Her current work is on DNA diagnostics in common diseases.
2. Wied A. J. J. M. Ruijssenaars, PhD, is a full professor of special education and childcare at Leiden University in the Netherlands. His current interests include learning disabilities, assessment and decision making and the structure of intervention processes. Address: D. C. M. Gersons-Wolfensberger, Health Council of the Netherlands, PO Box 1236,228OCE, Rijswijk, The Netherlands.