NASHVILLE, Tenn.--(BUSINESS WIRE)--HCA Healthcare, Inc. (NYSE:HCA), one of the nation's leading healthcare providers, today announced new research published in The New England Journal of Medicine (NEJM) demonstrating promising results from a gene-editing therapy being investigated in children ages 5-11 with severe sickle cell disease and transfusion-dependent beta thalassemia. Sickle cell disease and beta thalassemia are inherited blood disorders that can cause serious, lifelong complications b