A 12-year-old boy in the Washington, D.C., area faces months of procedures to remedy his disease. “I want to be cured,” he said.A 12-year-old boy in the Washington, D.C., area faces months of procedures to remedy his disease. “I want to be cured,” he said.Read MoreSickle Cell Anemia, Genetic Engineering, Therapy and Rehabilitation, Bluebird Bio Inc, Childrens National HospitalNYT > Health