Effects of low doses of inhaled nitric oxide combined with oxigen for the evaluation of pulmonary vascular reactivity in patients with pulmonary hypertension - Azeka, E.; Auler Júnior, J. O. Costa; Kajita, A. C.; Alliman, A. C.; Ramires, José Antônio Franchini; Ebaid, Munir (Peadiatric Cardiology, 2002)