1. Department of Prosthetic Dentistry, Universitätsklinikum
Regensburg, Regensburg, Germany
2. Department of Cariology, Endodontology and Periodontology, University
of Leipzig Faculty of Medicine, Leipzig, Germany
3. Department of Sports Medicine, Institute for Applied Scientific
Training, Leipzig, Germany
4. Department of Sports Medicine, Charité University Medicine,
Berlin, Germany
5. Department of Oral, Craniomaxillofacial and Facial Plastic Surgery,
University of Leipzig Faculty of Medicine, Leipzig, Germany