Fig. 4.

(a) Interleukin (IL)-17 levels in bronchoalveolar lavage (BAL) fluid determined by immuno-polymerase chain reaction (IPCR) in samples from healthy controls (HC), sarcoidosis patients without Löfgren's syndrome (non-Löf) and with Löfgren's syndrome. Sarcoidosis patients with Löfgren's syndrome were divided into two subgroups; human leucocyte antigen (HLA)-DR3⁺ and HLA-DR3^–. (b) Comparison of IL-17 levels between. DR3⁺ Löfgren's patients and DR3^– non-Löfgren's patients. *P < 0·05; **P < 0·01.