Common variant at 16p11.2 conferring risk of psychosis by Steinberg, S, De Jong, S, Mattheisen, M, Mattheisen, M, Mattheisen, M, Costas, J, Demontis, D, Demontis, D, Jamain, S, Jamain, S, Pietiläinen, O, Pietiläinen, O, Pietiläinen, O, Lin, K, Papiol, S, Papiol, S, Huttenlocher, J, Huttenlocher, J, Sigurdsson, E, Sigurdsson, E, Vassos, E, Giegling, I, Breuer, R, Fraser, G, Walker, N