Symptoms of both injuries often overlap, making it difficult for doctors to peel apart the effects of each.

WSJ: For Wounded Vet, Love Pierces the Fog of War

Creating two categories of mothers pits one against the other, and obscures the way traditional mommy-dividing categories often overlap.

CNN: Non, the French are not better moms

Donor projects, especially bilateral ones, too often overlap with each other.

ECONOMIST: Burkina Faso's fight against AIDS