the study group comprised 55 infants and children with a normal heart : 15 neonates ( greater than 1 week to less than 1 month old ) , 10 infants ( greater than 1 month to less than 1 year old ) and 30 children , 10 each in the age group greater than 1 year to less than 5 years , greater than 5 to less than or equal to 10 years and greater than 10 years .
C0021270
infants
C0008059
children