Ramich, Tatjana
Asendorf, Anne
Nickles, Katrin
Oremek, Gerhard M.
Schubert, Ralf
Nibali, Luigi
Wohlfeil, Martin
Eickholz, Peter http://orcid.org/0000-0002-1655-8055
Funding for this research was provided by:
German Society of Periodontology
German Society of Dental, Oral, and Maxillofacial Medicine
New Working Group for Periodontology
Freiherr Carl von Rothschild'sche Stiftung Carolinum, Frankfurt, Germany
Article History
Received: 14 November 2017
Accepted: 16 February 2018
First Online: 27 February 2018
Compliance with ethical standards
:
: Tatjana Ramich declares that she has no conflict of interest. Anne Asendorf declares that she has no conflict of interest. Katrin Nickles declares that she has no conflict of interest. Gerhard M. Oremek declares that he has no conflict of interest. Ralf Schubert declares that he has no conflict of interest. Luigi Nibali declares that he has no conflict of interest. Martin Wohlfeil declares that he has no conflict of interest. Peter Eickholz declares that he has no conflict of interest.
: The study conforms to the provisions of the Declaration of Helsinki (as revised in Tokyo 2004) and had been approved by the Institutional Review Board for Human Studies of the Medical Faculty of the Goethe-University Frankfurt/Main (Application# 188/06). For the 5 years re-examination a respective amendment was submitted and approved.
: All participating individuals were informed on risks and benefits as well as the procedures of the re-examination and gave written informed consent.