[1] Maastricht Univ, Med Ctr, Maastricht, Netherlands
[2] Radboud Univ Nijmegen, Med Ctr, Nijmegen, Netherlands
[3] Oslo Univ Hosp, Oslo, Norway
[4] Erasmus MC, Rotterdam, Netherlands
[5] Netherlands Canc Inst, Amsterdam, Netherlands
[6] Univ Med Ctr Utrecht, Utrecht, Netherlands
[7] Royal Cornwall Hosp NHS Trust, Truro, England
[8] Rijnstate Hosp, Arnhem, Netherlands
[9] Masaryk Univ, Brno, Czech Republic
[10] Univ Hosp Brno, Brno, Czech Republic
[11] Univ Bergen, Bergen, Norway
[12] MUMC, Maastricht, Netherlands
[13] Maastricht Univ, Maastricht, Netherlands