Copperheads (Agkistrodon contortrix) are venomous snakes that inhabit the Eastern and Central United States. But could you pick one out of a lineup of venomous snakes? If the answer is no, then read ...

Medicare accountable care organizations use preferred skilled nursing facility networks for postacute care management, although the size, structure, and resource allocation of networks vary widely.

A traditional view is that, biologically, there are exactly two sexes, and each person can be accurately described as simply female or male. This is often called a binary view of sex. This view is ...