[1] Univ Gothenburg, Dept Biomat, Gothenburg, Sweden
[2] Malmo Univ, Dept Mat Sci & Technol, Malmo, Sweden
[3] Univ Bern, Dept Oral Surg & Stomatol, Sch Dent Med, Bern, Switzerland
[4] Univ Melbourne, Melbourne Dent Sch, Carlton, Vic 3053, Australia
[5] Univ Texas Hlth Sci Ctr San Antonio, Dept Periodont, San Antonio, TX 78229 USA
[6] Univ Ghent, Dept Periodontol & Oral Implantol, B-9000 Ghent, Belgium
[7] Univ Gothenburg, Dept Prosthet Dent Dent Mat Sci, Inst Odontol, Sahlgrenska Acad, Gothenburg, Sweden
[8] Mayo Clin, Dept Dent Special, Rochester, MN USA
[9] Harvard Univ, Sch Dent Med, Dept Oral Med Infect & Immun, Div Periodontol, Boston, MA 02115 USA
[10] Univ Gothenburg, Dept Oral & Maxillofacial Surg, Inst Odontol, Sahlgrenska Acad, Gothenburg, Sweden
[11] Univ Milan, Dept Periodontol, Milan, Italy
[12] Univ Connecticut, Dept Reconstruct Sci, Sch Dent Med, Hartford, CT 06112 USA
[13] Malmo Univ, Dept Prosthodont, Fac Odontol, Malmo, Sweden