1. Barts Health NHS Trust The Royal London Dental Hospital London UK
2. Barts and The London School of Medicine and Dentistry Queen Mary University of London London UK
3. Department of Periodontology University of Bern Bern Switzerland
4. Private practice Torino Italy
5. Department of Maxillo‐facial Surgery University of Torino Torino Italy
6. Department of Periodontics and Oral Medicine University of Michigan Ann Arbor Michigan USA