title: Letter to the Editor: Authors' Response.
authors: Division of Conservative Dentistry and Periodontology and Competence Center for Periodontal Research, Bernhard Gottlieb School of Dentistry, Medical University of Vienna, Vienna, Austria.
authors: Hady
authors: H
authors: Haririan
authors: Division of Conservative Dentistry and Periodontology and Competence Center for Periodontal Research, Bernhard Gottlieb School of Dentistry, Medical University of Vienna, Vienna, Austria.
authors: Oleh
authors: O
authors: Andrukhov
authors: Division of Conservative Dentistry and Periodontology and Competence Center for Periodontal Research, Bernhard Gottlieb School of Dentistry, Medical University of Vienna, Vienna, Austria.
authors: Xiaohui
authors: X
authors: Rausch-Fan
authors: Department of Medical Statistics, Medical University of Vienna.
authors: Eleonore
authors: E
authors: Pablik