title: A longitudinal study of very low-birthweight infants. I: study design and mortality rates.
mesh_terms: D000138:Acidosis / Q000628:therapy; D001784:Blood Gas Analysis; D006801:Humans; D007224:Infant Care; D007226:Infant Mortality; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D007236:Infant, Small for Gestational Age; D007362:Intensive Care Units; D008137:Longitudinal Studies; D010102:Oxygen Inhalation Therapy; D012107:Research Design; D012131:Respiratory Insufficiency / Q000628:therapy