CD4 and sarcoidosis: In this study, genetic predictors of relative levels of T-cells (CD3+, CD4+, and CD8+) measured by flow-cytometry, and of derived CD4/CD8 ratio in peripheral blood from healthy individuals (data available from Ferreira et al. 22), were used to measure the genetic contribution of T-cells subtypes in sarcoidosis entities, LS and non-LS.