van Steenberghe Daniel, Quirynen Marc, Svensson Barbro, Brånemark Per-Ingvar
Department of Periodontology, School of Dentistry, Oral Pathology and Maxillofacial Surgery, Catholic University Leuven, Belgium.
Periodontol 2000. 2003;33:90-104. doi: 10.1046/j.0906-6713.2002.03308.x.