EPO and amyotrophic lateral sclerosis: Those nine pathways include in no specific order: the metabolism of proteins; immune system; adaptive immune system; Alzheimer’s disease; axon guidance; amyotrophic lateral sclerosis (ALS); erythropoietin-producing human hepatocellular receptor A (EPHA) and B (EPHB) forward signalling and metabolism of lipids and lipoproteins.