Whole blood stimulation
Blood samples were either unstimulated (control), or stimulated with 100 ng/mL of lipopolysaccharide (LPS, from Escherichia coli 0111:B4, Sigma-Aldrich, St. Louis, MO), IFN-γ (Sigma Aldrich, St. Louis, MO) or a combination of both. The IFN-γ dose (100 ng/mL) was chosen based on prior experiments [36].