1. Fredrik Jansson, Thomas Frisell, and Olof Akre, Karolinska Institute; Olof Akre, Karolinska University Hospital; Fredrik Jansson, Danderyd Hospital, Stockholm; Linda Drevin, Regional Cancer Centre, Uppsala/Örebro; Pär Stattin, Uppsala University Hospital, Uppsala; and Ola Bratt, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.