in four infants with electrocardiographic or other evidence of toxicity , the mean serum level was 71 plus or minus 2 ng/ml ( range 68-72 ) , and in four children with electrocardiographic or other evidence of toxicity , the mean serum level for digitoxin was 72 plus or minus 14 ng/ml ( range 53-84 ) .
C0021270
infants
C0008059
children