title: A controlled trial of assisted ventilation using an oro-nasal mask.
mesh_terms: D006801:Humans; D006863:Hydrogen-Ion Concentration; D007231:Infant, Newborn; D007440:Intubation; D008397:Masks; D010100:Oxygen / Q000097:blood; D010102:Oxygen Inhalation Therapy; D012121:Respiration, Artificial / Q000009:adverse effects; D012127:Respiratory Distress Syndrome, Newborn / Q000401:mortality / Q000628:therapy*
chemical_list: D010100:Oxygen