Cancer as a complex phenotype: pattern of cancer distribution within and beyond the nuclear family. oleh Laufey T Amundadottir, Sverrir Thorvaldsson, Daniel F Gudbjartsson, Patrick Sulem, Kristleifur Kristjansson, Sigurdur Arnason, Jeffrey R Gulcher, Johannes Bjornsson, Augustine Kong, Unnur Thorsteinsdottir, Kari Stefansson