مؤلف: Leif K. Bakland

Jens O. Andreasen, University Hospital (Rigshospitalet), Copenhagen, Denmark. Leif K. Bakland, Loma Linda University, California, US. Maria Teresa Flores, Faculty of Dentistry, University of Valparaiso, Chile. Frances M. Andreasen, University Hospital (Rigshospitalet), Copenhagen, Denmark. Lars Andersson, Kuwait University, Safat, Kuwait.