Interleukin-37 Treatment of Mice with Metabolic Syndrome Improves Insulin Sensitivity and Reduces Pro-inflammatory Cytokine Production in Adipose Tissue — IL-37 treatment ameliorates established metabolic syndrome — Interleukin-37 treatment of mice with metabolic syndrome improves insulin sensitivity and reduces pro-inflammatory cytokine production in adipose tissue — IL-37 treatment ameliorates established metabolic syndrome