The Lancet Neurology; Vol 11 Majounie, E, Renton, A E, Mok, K, Dopper, E G P, Waite, A, Rollinson, S, Chio, A, Restagno, G, Nicolaou, N, Simon-Sanchez, J, van Swieten, J C, Abramzon, Y, Johnson, J O, Sendtner, M, Pamphlett, R, Orrell, R W, Mead, S, Sidle, K C, Houlden, H, Rohrer, J D, Morrison, K E, Pall, H, Talbot, K, Ansorge, O, Hernandez, D G, Arepalli, S, Sabatelli, M, Mora, G, Corbo, M, Giannini, F, Calvo, A, Englund, E, Borghero, G, Foris, G L, Remes, A M, Laaksovirta, H, McCluskey, L, Trojanowski, J Q, Van Deerlin, V M, Schellenberg, G D, Nalls, M A, Drory, V E, Lu, C S, Yeh, T H, Ishiura, H, Takahashi, Y, Tsuji, S, Le Ber, I, Brice, A, Drepper, C, Williams, N, Kirby, J, Shaw, P, Hardy, J, Tienari, P J, Heutink, P, Morris, H R, Pickering-Brown, S & Traynor, B J 2012, ' Frequency of the C9orf72 hexanucleotide repeat expansion in patients with amyotrophic lateral sclerosis and frontotemporal dementia: a cross-sectional study ', Lancet Neurology, vol. 11, no. 4, pp. 323-330 . https://doi.org/10.1016/S1474-4422(12)70043-1 Lancet Neurology, 11(4), 323-330. Lancet Publishing Group Nature Communications Nature Communications, Nature Publishing Group, 2012, 11 (4), pp.323-30. ⟨10.1016/S1474-4422(12)70043-1⟩ Nature Communications, 2012, 11 (4), pp.323-30. ⟨10.1016/S1474-4422(12)70043-1⟩ Lancet Neurology; 11(4), pp 323-330 (2012)