1. Private Practice Zürich Switzerland
2. Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine University of Bern Bern Switzerland
3. Department of Restorative Dentistry and Biomaterials Sciences Harvard School of Dental Medicine Boston Massachusetts USA
4. Department of Oral Surgery and Stomatology, School of Dental Medicine University of Bern Bern Switzerland
5. Department of Reconstructive Dentistry, School of Dental Medicine University of Geneva Geneva Switzerland
6. Private Practice Geneva Switzerland