Each year, approximately 30,000 patients in the U.S. will be diagnosed with life-threatening diseases such as leukemia, which are treatable by a marrow or stem cell transplant. Just one in three will find a donor match within their family. If you would like to help, join the National Marrow Donor Program Registry — all it takes is a simple blood test. Anyone between the ages of 18-60 and in good general health can join the registry.