RT Journal Article SR Electronic T1 Folic acid deficiency in infants and children with heart disease. JF British Heart Journal JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 87 OP 92 DO 10.1136/hrt.35.1.87 VO 35 IS 1 A1 G D Rook A1 R Lopez A1 N Shimizu A1 J M Cooperman YR 1973 UL http://heart.bmj.com/content/35/1/87.abstract AB