1 Simer Jit Bains, University of Oslo and Akershus University Hospital, Oslo, Norway; Milada Mahic, Norwegian Institute of Public Health, Oslo, Norway; Tor Åge Myklebust, Cancer Registry of Norway, Oslo, Norway; Milada Cvancarova Småstuen, University of Oslo, Oslo, Norway; Sheraz Yaqub, Oslo University Hospital, Oslo, Norway; Liv Marit Dørum, Cancer Registry of Norway, Oslo, Norway; Bjørn Atle Bjørnbeth, Oslo University Hospital, Oslo, Norway; Bjørn Møller, Cancer Registry of Norway, Oslo, Norway; Kristoffer Watten Brudvik, Oslo University Hospital, Oslo, Norway; and Kjetil Taskén, University of Oslo and Oslo University Hospital, Oslo, Norway.