Frank Schwarz,* Anton Sculean,† Mohammad Berakdar,† Thomas Georg,‡ Elmar Reich,§ and Jürgen Becker*
* Department of Oral Surgery, Heinrich Heine University, Düsseldorf, Germany.
† Department of Operative Dentistry and Periodontology, Johannes Gutenberg University, Mainz, Germany. ‡ Institute of Medical Biometrics, Epidemiology and Medical Informatics, University of the Saarland,
§ Department of Periodontology and Conservative Dentistry, University of the Saarland.
J Periodontol • May 2003