CD4+ and CD8+ T lymphocyte counts and ratio in cats with chronic gingivostomatitis and naturally infected with feline immunodeficiency virus: a preliminary study - Haipek, Katia; Daniel, Alexandre Gonçalves Teixeira; Filgueira, Kilder Dantas; Sellera, Fábio Parra; Gargano, Ronaldo Gomes; Kfoury Junior, José Roberto; Oliveira, Lilian de Jesus; Cunha, Janaína Munuera; Reche Junior, Archivaldo (Acta Veterinaria Brasilica, 2022)