Mother of twins needs stem cell transplant. Tammy McLash, from Canada, 38, was diagnosed with acute myeloid leukemia and  urgently needs a stem cell transplant. Finding a stem cell match has been elusive.  Tammy’s sister and brother were not matches. The family is making a plea for people to become stem cell donors. The family is encouraging the public to join the  One Match stem cell database, www.onematch.ca.  A stem cell match from a donor is a cure for leukemia. Will you get tested? Save One Person. Save The World.