Inhaled nitric oxide increases urinary nitric oxide metabolites and cyclic guanosine monophosphate in premature infants: relationship to pulmonary outcome.

Ballard PL, Keller RL, Black DM, Durand DJ, Merrill JD, Eichenwald EC, Truog WE, Mammel MC, Steinhorn R, Ryan RM, Courtney SE, Horneman H, Ballard RA, Investigators of TOLSURF Pilot and TOLSURF