The patients is moved to operation theater at the day of the procedure. The bone marrow of the patients is harvested by two investigators. The mononuclear cells of the bone marrow is extracted from the bone marrow by using gravity centrifugation with Ficoll Paque 1.073. The mononuclear cells is transferred to 5 mL syringe and handed back to the investigator. The investigator will transplant the whole cell preparation back to the patients by lumbar injection.