[1] Karolinska Inst, Oncol & Pathol, Stockholm, Sweden
[2] Norrlands Univ Hosp, Umea, Sweden
[3] Ouh Radiumhosp, Dept Oncol, Oslo, Norway
[4] Skanes Univ Hosp, Lund, Sweden
[5] Karolinska Univ Hosp, Stockholm, Sweden
[6] Aarhus Univ Hosp, Oncol, Aarhus C, Denmark
[7] Odense Univ Hosp, Dept Clin Oncol, Odense C, Denmark
[8] Centralsjukhuset, Karlstad, Sweden
[9] Sahlgrens Univ Hosp, Gothenburg, Sweden
[10] Copenhagen Univ Hosp, Rigshosp, Dept Oncol, Copenhagen, Denmark
[11] Univ Oslo, Hosp Ulleval, Oslo, Norway