In the article "Folic Acid Supplementation in Low Birth Weight Infants," by Stevens et al (Pediatrics 64:333-335, 1979) two corrections were received after the journal went to press. In Table 1, RCF values should read ng/ml not µg/ml. On page 335, first column, line 21, RCF levels should read less than 100 ng/ml not 100 µg/ml.