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(A). Comparison of vitamin A supplementation versus control. Outcome 1: neonatal death (death before 1 month). (B). Comparison of vitamin A supplementation versus control. Outcome 2: bronchopulmonary dysplasia (oxygen use at 28 days in survivors) (C). Comparison of vitamin A supplementation versus control. Outcome 3: bronchopulmonary dysplasia at 36 weeks’ postmenstrual age in survivors (D). Comparison of vitamin A supplementation versus control. Outcome 4: length of hospital stays.
