1. American Academy of Periodontology. Consensus report on diagnosis and diagnostic aids. In: World workshop in clinical periodontics. Chicago: American Academy of Periodontology; 1989. p. 123–131.
2. Cardoso EM, Reis C, Manzanares-Céspedes MC. Chronic periodontitis, inflammatory cytokines, and interrelationship with other chronic diseases. Postgrad Med. 2018;130(1):98–104.
3. Carvalho FM, Tinoco EM, Deeley K, Duarte PM, Faveri M, Marques MR, Mendonça AC, Wang X. FAM5C contributes to aggressive periodontitis. PLoS One. 2010;5(4):e10053.
4. Caton J. Periodontal diagnosis and diagnostic aids. In: World workshop in clinical periodontics. Chicago: American Academy of Periodontology; 1989. p. 1–122.
5. Caton JG, Armitage G, Berglundh T, Chapple ILC, Jepsen S, Kornaman KS, Mealey BL, Papapanou PN, Sanz M, Tonetti MS. A new classification scheme for periodontal and peri-implant diseases and conditions—introduction and key changes from the 1999 classification. J Clin Periodontol. 2018;45(Suppl 20):S1–8.