| http://www.w3.org/ns/prov#value | - Sarcoidosis requires at least 3 major events: exposure to antigen; acquired cellular immunity directed against the antigen mediated through antigen presenting cells and antigen specific T lymphocytes; and the appearance of immune effector cells that promote a more nonspecific inflammatory response.The characteristic lesion of sarcoidosis is a discrete, compact, noncaseating epitheloid cell granulo
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