1. Section of Cariology and Endodontics, Department of Odontology, Faculty of Health and Medical Sciences University of Copenhagen Copenhagen Denmark
2. Section of Oral Biology and Immunopathology, Department of Odontology, Faculty of Health and Medical Sciences University of Copenhagen Copenhagen Denmark
3. Department of Endodontics, Academic Center for Dentistry Amsterdam (ACTA) University of Amsterdam and Vrije Universiteit Amsterdam The Netherlands
4. Department of Periodontology, Academic Centre for Dentistry Amsterdam (ACTA) University of Amsterdam and Vrije Universiteit Amsterdam The Netherlands