1. School of Engineering and Materials Science; Queen Mary University of London; Mile End Road London E1 4NS United Kingdom
2. Department of Biomaterials; Sahlgrenska Academy at University of Gothenburg; Box 412 SE-405 30 Göteborg Sweden
3. Dental Physical Sciences; Barts and the London School of Medicine and Dentistry, Queen Mary University of London; Mile End Road London E1 4NS United Kingdom
4. Otto-Schott-Institut; Friedrich-Schiller-Universität; Fraunhoferstr. 6 07743 Jena Germany