5. Group E: 3 ambulatory early-stage subjects with arm weakness but not paralysis, to receive bilateral L2 through L5 injections of 8x106 cells (20 injections of 4x105 cells/ injection) and then approximately 4-12 weeks later to receive bilateral C3 through C5 injections of 8x106 cells (20 injections of 4x105 cells/ injection.