TNF and metabolic syndrome: MS: Metabolic syndrome; CRP: C-reactive protein; TG: Triglycerides; HDL-C: High-density lipoprotein cholesterol; TC: Total cholesterol; LDL-C: Low-density lipoprotein cholesterol; HOMA-IR: Homeostatic model assessment insulin resistance.; TNF-alpha: Tumor necrosis factor alpha; BMI: Body mass index.