The microRNA cluster miR-17∼92 promotes TFH cell differentiation and represses subset-inappropriate gene expression. by Baumjohann, D, Kageyama, R, Clingan, J, Morar, M, Patel, S, de Kouchkovsky, D, Bannard, O, Bluestone, J, Matloubian, M, Ansel, K, Jeker, LT, Jeker, LT