CCL17 and amyotrophic lateral sclerosis: We evaluated sera from 69 Guam ALS cases collected within 2 years of symptom onset by NIH researchers from 1950 to 1983 for 11 immunoregulators via ELISA (CRP, eotaxin‐1, RANTES, IL‐6, IL‐8, IL‐10, IFN‐γ, IP‐10, MCP‐1, MCP‐2 and TARC).