Ulfarsson, M O, primary, Walters, G B, additional, Gustafsson, O, additional, Steinberg, S, additional, Silva, A, additional, Doyle, O M, additional, Brammer, M, additional, Gudbjartsson, D F, additional, Arnarsdottir, S, additional, Jonsdottir, G A, additional, Gisladottir, R S, additional, Bjornsdottir, G, additional, Helgason, H, additional, Ellingsen, L M, additional, Halldorsson, J G, additional, Saemundsen, E, additional, Stefansdottir, B, additional, Jonsson, L, additional, Eiriksdottir, V K, additional, Eiriksdottir, G R, additional, Johannesdottir, G H, additional, Unnsteinsdottir, U, additional, Jonsdottir, B, additional, Magnusdottir, B B, additional, Sulem, P, additional, Thorsteinsdottir, U, additional, Sigurdsson, E, additional, Brandeis, D, additional, Meyer-Lindenberg, A, additional, Stefansson, H, additional, and Stefansson, K, additional