1. Department of Periodontology, Endodontology and Cariology; University Centre for Dental Medicine; University of Basel; Basel Switzerland
2. Department of Biomedical Engineering; University of California; Davis CA USA
3. Division of Endodontology; Department of Conservative Dentistry; School of Dental Medicine; University of Tübingen; Tübingen Germany
4. Department of Preclinical Imaging and Radiopharmacy; Werner Siemens Imaging Center; University of Tübingen; Tübingen Germany