RORC and asthma: To better understand the role of IL-17A in asthma and rhinitis we investigated: 1) the levels of IL-17A in sputum supernatants (Ss), in nasal wash (NW) and in plasma (P), and 2) the levels of intracellular IL-17A, RORγ(t) and FoxP3 expression in peripheral T-lymphocytes.