Genome wide association study of clinical duration and age at onset of sporadic CJD by Hummerich, H, Speedy, H, Campbell, T, Darwent, L, Hill, E, Collins, S, Stehmann, C, Kovacs, GG, Geschwind, MD, Frontzek, K, Budka, H, Gelpi, E, Aguzzi, A, van der Lee, SJ, van Duijn, CM, Liberski, PP, Calero, M, Sanchez-Juan, P, Bouaziz-Amar, E, Laplanche, J, Haïk, S, Brandel, J, Mammana, A, Capellari, S