NRGN and Miyoshi myopathy: Notably, in non-MM(V)1 group, Ng behaved as a protective factor (with statistical significance in the third tertiles) probably because Ng levels are higher in the “cortical” sCJD MM(V)2C subtype than in the “subcortical” and faster-progressing sCJDVV2 (mean disease duration 18 vs. 6.5 months).