RESULTS	The mean serum level of vitamin A was significantly higher in the vitamin A supplemented infants than in the control infants on day 7 ( 1.41 + / - 0.48 vs. 0.92 +0.38 pmol / L , p < 0.001 ) , day 14 ( 1.48 + / - 0.90 vs. 0.96 + / - 0.36 micromol/L , p = 0.001 ) and day 28 ( 1.42 + / - 0.63 vs. 0.76 + / - 0.30 micromol/L , p < 0.001 ) after vitamin A supplementation .\