https://link.springer.com/article/10.1007/s00247-018-4149-1
> Abusive head trauma (AHT) is the leading cause of fatal head injuries in children younger than 2 years.
> There is no controversy concerning the medical validity of the existence of AHT, with multiple components including subdural hematoma, intracranial and spinal changes, complex retinal hemorrhages, and rib and other fractures that are inconsistent with the provided mechanism of trauma