Fig. 2From: Macrophage migration inhibitory factor may play a protective role in osteoarthritisBoxplots for natural log-transformed plasma cytokine levels. MIF, macrophage migration inhibitory factor; TNF-a, tumor necrosis factor alpha; IL-6, interlukin-6; IL-1β, interlukin-1β; OA, osteoarthritis. Log concentration for MIF: log ng/ml; log concentration for TNF-a, IL-6, and IL-1β: log pg/ml; p values were obtained from Mann-Whitney U testBack to article page