Effects of long-term sildenafil treatment for pulmonary hypertension in infants with chronic lung disease.
Mourani PM, Sontag MK, Ivy DD, Abman SH. Effects of long-term sildenafil treatment for pulmonary hypertension in infants with chronic lung disease. J Pediatr. 2009 Mar; 154(3):379-84, 384.e1-2.