I sing in a choir http://www.365casinos.com/haunted-opera-casino/ haunted opera casino  Every year, more than 12,000 Americans are diagnosed with a disease that requires a lifesaving bone marrow transplant. Cancer patients need to replenish their bone marrow supply since many of their stem cells can be killed off by high doses of chemotherapy. Anything less than a perfect match could cause the patient's body to reject the transplant.