<qa>  How much is caloric intake in both groups?In both groups, caloric intake will start at 29-34 kcalkg day i.e., approximately 20-25 calories per kilogram from glucose and 9 calories per kilogram from lipids. Caloric intake will be progressively increased depending on the infants tolerance to glucose. Protein to glucose ratio in the control group will be 250-312 and nitrogen balance ratio including all calories will be approximately 362-425. In the study group, protein to glucose ratio will be 64-80 and nitrogen balance ratio including all calories will be 93-109. The control group corresponds to the current standard of care. The study group nitrogen balance is within the limits of recent studies which show that a nitrogen balance ratio of 46-78 is appropriate for ELBW infants. 