What is the safest place for a toddler car seat and an infant seat in a mini-van?

I should clarify. I know not to put the children in the front seat. However, is the safest the last row of the van or the middle bucket seats or first row of the van?

The back seat. Always the back seat!!

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Car crashes leading cause of child deaths
Merely having a child in a car seat is not a complete solution for the child’s safety. Having a car seat that best fits both the child and the vehicle, and one that is used correctly every time, can ensure a child’s survival in a vehicle collision or…