[1] Univ Ziekenhuis Brussels, Brussels, Belgium
[2] Ghent Univ Hosp, Ghent, Belgium
[3] Univ Hosp Gasthuisberg, B-3000 Louvain, Belgium
[4] UZ Brussel, Brussels, Belgium
[5] Inst Jules Bordet, B-1000 Brussels, Belgium
[6] Clin & Maternite Sante Elisabeth, Namur, Belgium
[7] CHC Clin St Joseph, Liege, Belgium
[8] Grand Hop Charleroi, Charleroi, Belgium
[9] Catholic Univ Louvain, Ctr Canc, B-1200 Brussels, Belgium
[10] Ctr Hospier Luxembourg, Luxembourg, Luxembourg
[11] AZ Middelheim Hosp, Antwerp, Belgium
[12] CHU Sart Tilman, Dept Resp Med, B-4000 Liege, Belgium
[13] Univ Hosp Leuven, Leuven, Belgium
[14] Univ Ziekenhuis Brussels, Dept Med Oncol, Oncol Ctr, Brussels, Belgium
[15] ZNA Campus Jan Palfijn Middelheim, Merksem, Belgium
[16] Univ Ziekenhuis Brussels, Jette, Belgium