My lede:

Kathy Niedzwiecki of Pelham, N.H., and Ken Crowder of St. Louis needed new kidneys and had loved ones willing to donate them — but those donors were medically incompatible.

Thanks to a United Network for Organ Sharing pilot program launched in 2010 that matches incompatible donor-recipient pairs through a nationwide pool, Niedzwiecki and Crowder got the kidney transplants they needed.

Read the whole shebang.