1.   Now her prayers are focused on the hope that a donor will step forward to give genetically matched bone marrow that could save the life of her son.

2.   Now scientists have created an early human embryo, which they say is an important step toward providing genetically matched replacement cells as treatments for diseases.

3.   Patients could walk into hospital carrying their own genetically matched homemade repair kit.

4.   The patients had been unlucky in that transplants were their only hope, genetically matched donors were not available, and time was running out.