Self-reactive human CD4 T cell clones form unusual immunological synapses. by Schubert, D, Gordo, S, Sabatino, J, Vardhana, S, Gagnon, E, Sethi, D, Seth, N, Choudhuri, K, Reijonen, H, Nepom, G, Evavold, B, Dustin, M, Wucherpfennig, K