Also, other proteins such as IL-12 (Beirne et al. 2009; Shigehara et al. 2003), MCP-1 and MIP-1 (Beirne et al. 2009; Hashimoto et al. 1998) previously reported as up-regulated in sarcoidosis, did not differ significantly between our studied populations. Here, CCL2 is linked to sarcoidosis.