Agreement among international periodontal experts using the 2017 World Workshop classification of periodontitis

1. Ravidà, A.
2. Travan, S.
3. Saleh, M.H.A.
4. Greenwell, H.
5. Papapanou, P.N.
6. Sanz, M.
7. Tonetti, M.
8. Wang, H.-L.
9. Kornman, K.