Identification of FOXP1 deletions in three unrelated patients with mental retardation and significant speech and language deficits. by Horn, D, Kapeller, J, Rivera-Brugués, N, Moog, U, Lorenz-Depiereux, B, Eck, S, Hempel, M, Wagenstaller, J, Gawthrope, A, Monaco, A, Bonin, M, Riess, O, Wohlleber, E, Illig, T, Bezzina, C, Franke, A, Spranger, S, Villavicencio-Lorini, P, Seifert, W, Rosenfeld, J, Klopocki, E, Rappold, G, Strom, T