(AP) — For months, two sisters argued over which of them was in most urgent need of a lung transplant.

Each wanted the other to go first.

In the end, the argument was resolved in an unusual way. Seventy-one-year-old Irma Myers-Santana and her younger sister, 69-year-old Anna Williamson, each received one lung from the same donor, in what doctors at Houston Methodist Hospital say is a first for their facility.

The sisters had idiopathic pulmonary disorder, a scarring of the lungs that often requires a transplant.

But the two are also Jehovah’s Witnesses and insisted on a “bloodless transplant” because their religion doesn’t allow transfusions. Houston Methodist is the only hospital in the country that does such transplants.

Now, for the first time in years, both sisters can both breathe easy.