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FDG uptake in BA4, spinal cord and psoas muscle in ALS according to patient outcome. Long-term survival was associated with a higher FDG accumulation in BA4 (a) and a lower FDG uptake in the cervical spinal cord (b). Psoas muscle showed a similar FDG uptake in the two subgroups (d) but greater homogeneity of tracer retention (e) and higher volumes (c) in survivors. *p < 0.05 vs controls
