But what they did, of course, since it was so complicated and expensive, they only used it on the zero-year-olds and the one-year-olds.
Όμως, εφόσον  ήταν τόσο περίπλοκη και ακριβή την εφάρμοσαν μόνο  σε βρέφη και σε παιδιά ενός έτους.