Gene variations in sex hormone pathways and the risk of testicular germ cell tumour: a case–parent triad study in a Norwegian–Swedish population Kristiansen, Wenche, Andreassen, Kristine Engen, Karlsson, Robert, Aschim, Elin Leirvoll, Bremnes, Roy M., Dahl, Olav, Fosså, Sophie Dorothea, Klepp, Olbjørn, Langberg, Carl W., Solberg, Arne, Tretli, Steinar, Adami, Hans-Olov, Wiklund, Fredrik, Grotmol, Tom, Haugen, Trine Berit (2012-03-08)