TNF and Miyoshi myopathy: Among patients with PM, elevated levels (P <0.05) of IL-1β, MIP-1β and G-CSF were observed in group <48 h, while the patients with MM of the group <48 h showed higher levels (P <0.05) of IL-1β, TNF-α, IL-10, MIP-1α, MIP-1β, G-CSF, in comparison with patients of group >48 h (data not shown).