Inhaled nitric oxide in premature neonates with severe hypoxaemic respiratory failure: a randomised controlled trial. - Kinsella JP; Walsh WF; Bose CL; Gerstmann DR; Labella JJ; Sardesai S; Walsh-Sukys MC; McCaffrey MJ; Cornfield DN; Bhutani VK; Cutter GR; Baier M; et al. (Lancet, 1999)