Furthermore, by measuring NfL concentrations in capillary samples, we successfully replicated models based on venous plasma, demonstrating a CAG-dependent increase in NfL levels in participants with HD (Serum: Fig. 6G, Supplementary Table 11, 12, Supplementary Fig. 16; Plasma: Supplementary Fig. 15b, Supplementary Table 13, 14, Supplementary Fig. 17) [7, 14]. The gene discussed is NEFL; the disease is Huntington disease.