The Use of Sildenafil in Persistent Pulmonary Hypertension of the Newborn - Vargas-Origel, Arturo; Gómez-Rodríguez, Guadalupe; Aldana-Valenzuela, Carlos; Vela-Huerta, Ma Martha; Alarcón-Santos, Salvador Benjamín; Amador-Licona, Norma (American Journal of Perinatology, 2010)