Mean concentrations of IL-4, IL-5, IL-13 and IL-9 secreted by PHA-stimulated whole blood cultures from healthy control subjects (HC, n = 12) and patients with Hashimoto thyroiditis (HT, n = 12) or papillary thyroid cancer (PTC, n = 12) or both papillary thyroid cancer and Hashimoto thyroiditis (PTC + HT, n = 4)