1. Institute of Biomedical Optics; University of Luebeck; Luebeck Germany
2. Department of Veterinary Pathology; College of Veterinary Medicine; Freie Universität Berlin; Berlin Germany
3. Department of Chemistry and Chemical Engineering; Royal Military College of Canada; Kingston Ontario Canada
4. Department of Oral and Maxillofacial Surgery; University Medical Center Hamburg-Eppendorf; Hamburg Germany