Salivary, blood and plasma nitrite concentrations in periodontal patients and healthy individuals before and after periodontal treatment - Meschiari, César Arruda; Zuardi, Leonardo Raphael; Gomes, Valéria A.; Almeida, Glauce Regina Costa de; Novaes Júnior, Arthur Belém; Gerlach, Raquel Fernanda; Marcaccini, Andréa Márcia (Clinica Chimica Acta, 2015)