CD4 and sarcoidosis: Since we published the observation of low or absent iNKT cells in blood, lung lavage, and draining lymph nodes of sarcoidosis patients using αGC‐loaded tetramers and Vα24Vβ11 TCR mAbs 23, further work has confirmed that these cells are indeed low and its residual numbers are inversely correlated with exaggerated BALF lymphocytosis and CD4+ T‐cell responses 24, supporting our proposition that deficiency in iNKT numbers is linked to excessive T‐cell proliferation.