11.   Both Oscar Robertson and his older daughter, Shana, were suitable donors.

12.   A suitable donor is said to have been found.

13.   A week later, a suitable donor was found.

14.   About half of heart transplant candidates die because no suitable donor can be found.

15.   After months of waiting for a suitable donor, transplant surgery was performed.

16.   But her doctors at Dana-Farber have combed through computer registries the world over and have been unable to find a single suitable donor.

17.   But transplant is an evolutionary process, and as we learn more, it sometimes changes who is a suitable donor.

18.   Falling rates of violent and accidental deaths, combined with rising numbers of people living long, healthy lives, are shrinking the pool of suitable donors.

19.   Harris said that finding a suitable donor through cord blood is faster and less painful than the bone marrow route, which can sometimes take months.

20.   He said he had collected blood samples from condemned prisoners at Xiaoxiguan Prison in Tianjin to find suitable donors for waiting kidney patients.