Role of endotoxin in the etiology of periapical lesions: molecular mechanisms involved in endotoxin's recognition and cell activation - Lucisano, Marília Pacífico; Nelson Filho, Paulo; Silva, Raquel Assed Bezerra da; Silva, Léa Assed Bezerra da; De Rossi, Andiara (RGO - Revista Gaúcha de Odontologia, 2014)