GUNEN, Hakan; KIZKIN, Ozkan. Relation Of Serum Theophylline Concentration And Slow Release Theophylline Dosage In Patients With COPD . Annals of Medical Research, [S. l.], v. 7, n. 3, p. 0230–0233, 2021. Disponível em: http://www.annalsmedres.org/index.php/aomr/article/view/2799. Acesso em: 16 sep. 2026.