METHODS	Eighty premature infants weighing < 1,500 g who received mechanical ventilation or oxygen supplementation at 24 hours ofage-admitted to Neonatal units ofSrinagarind Hospital , Khon Kaen University , Khon Kaen , Thailand-were assigned to receive either intramuscular vitaminA 5 , 000 IU3 times/week ( treatment group ) or sham procedure ( control group ) for four weeks .\