1. Cambridge University Hospitals; Cambridge UK
2. Central Manchester University Hospitals; Manchester UK
3. University of Alberta and Institute for Reconstructive Sciences in Medicine; Edmonton AB Canada
4. Shea Ear Clinic; Memphis TN USA
5. University Hospitals Birmingham; Birmingham UK
6. Oticon Medical; Somerset NJ USA
7. Oticon Medical; Askim Sweden
8. Department of Biomaterials; Sahlgrenska Academy at University of Gothenburg; Gothenburg Sweden
9. Radboud University; Nijmegen The Netherlands