Line 2:1·"Radiological implications" is not a recognised heading for this article type.
Biographical Lifespan
suggestion
"History and etymology"
Line 4:1·A bold element in the History and etymology section should be a person; it would be useful to have their lifespan details: '<h4>History and etymology</h4> <p>It derives from the Greek word <strong>Αφαίρεση</strong> '