In 2012, there were just 10 transplants in Sarah's age group, according to the United Network for Organ Sharing.

CNN: SHARE THIS

The United Network for Organ Sharing, the congressionally created agency that administers the organ-donor process, divides the country into districts.

FORBES: Why Should They Die?

Louis Children's Hospital is a board member at the United Network for Organ Sharing and helped write the current pediatric transplant system.

CNN: SHARE THIS