February 15, 2009 10:22 am Study: Stem Cell Donor Pool Expanding On any given day, an estimated 6,000 Americans who need a bone marrow transplant are searching the country’s donor banks, hoping to find the right match. Local 2:31 Cases of bacterial infections linked to rats are on the rise in NYC: What to know 1:56 Long Island children's hospital warns of possible measles exposure 2:05 Doctors warn of potential measles exposure on Long Island 3:00 Organ recipient becomes donation advocate 1:52 NYC businesses must now use lidded bins for trash