ISSN 0303 – 6979 VOLUME 48, NUMBER 1, JANUARY 2021 Editor: Maurizio Tonetti Offi cial journal of the European Federa on of Periodontology Founded by the Bri sh, Dutch, French, German, Scandinavian and Swiss Socie es of Periodontology wileyonlinelibrary.com/journal/jcpe EDITOR-IN-CHIEF: EDITORIAL BOARD: P. Hujoel, Seattle, WA, USA D. W. Paquette, Chapel Hill, NC, USA Maurizio Tonetti P. Adriaens, Brussels, Belgium J. Hyman, Vienna, VA, USA G. Pini-Prato, Florence, Italy Journal of Clinical Periodontology J. Albandar, Philadelphia, PA, USA I. Ishikawa, Tokyo, Japan P. Preshaw, Newcastle upon Tyne, UK Editorial Office G. Armitage, San Francisco, CA, J. Jansen, Nijmegen, the Netherlands M. Ryder, San Francisco, CA, USA John Wiley & Sons Ltd USA P.-M. Jervøe-Storm, Bonn, Germany G. E. Salvi, Berne, Switzerland 9600 Garsington Road, Oxford D. Botticelli, Rimini, Italy L. J. Jin, Hong Kong SAR, China A. Schaefer, Kiel-Schleswig-Holstein, OX4 2DQ, UK P. Bouchard, Paris, France A. Kantarci, Boston, MA, USA Germany E-mail:
[email protected] A. Braun, Marburg, Germany D. F. Kinane, Louisville, KY, USA D. A. Scott, Louisville, Kentucky, USA K. Buhlin, Huddinge, Sweden M. Kebschull, Bonn, Germany A. Sculean, Berne, Switzerland ASSOCIATE EDITORS: M. Christgau, Düsseldorf, Germany M. Klepp, Stavanger, Norway L. Shapira, Jerusalem, Israel T. Berglundh, Göteborg, Sweden P. Cortellini, Florence, Italy T. Kocher, Greifswald, Germany B. Stadlinger, Zürich, Switzerland I. Chapple, Birmingham, UK F. Cairo, Florence, Italy E. Lalla, New York, NY, USA A. Stavropoulos, Aarhus C, Denmark R. Demmer, New York, NY, USA G. Dahlen, Gothenburg, Sweden N. P. Lang, Berne, Switzerland D. Tatakis, Columbus, OH, USA G.