PITTSBURGH (AP) — The national organization that manages organ transplants on Monday resisted making emergency rule changes for children under 12 who are waiting on lungs but created a special appeal and review system to hear such cases.

The executive committee of the Organ Procurement and Transplantation Network held a teleconference to consider children who seek to qualify for adult lungs, and many members voiced serious ethical and medical concerns about a recent federal judge’s ruling that questioned the existing system.