The Ezer Mizion volunteer health organization is beaming. "When some 32,000 Israelis turned out to donate a blood sample to the Ezer Mizion [bone marrow] Data Registry last February, it wasn?t just Israeli cancer patients who were given new hope," reports the organization. "During the last few weeks the registry has received more than 100 search requests from 12 of the largest cancer hospitals and centers in the United States, who are also hoping that some of the Israeli donors will be matches for their cancer patients. Indeed, there has been significant growth in the data registry - a rise fom just 5,000 donors in 1998 to more than 90,000 donors today. Finding matches for cancer patients, however, is not particularly easy. Not only is four year - old Na'ama Bitoun still in need of a bone marrow transplant, but so are some 75 other children as well as 25 adults suffering from leukemia. Volunteers remain optimistic that their hard work will pay off. "Most potential donors are thrilled when they get the phone call," says Ofra Konikoff, the registry's donor coordinator. "They?re so excited about having the opportunity to help save another person's life that all they want to know is where they have to go and when they have to be there."