[1] Univ Helsinki, Cent Hosp, Helsinki, Finland
[2] Univ Lund Hosp, S-22185 Lund, Sweden
[3] Univ Klinikum Schleswig Holstein, Kiel, Germany
[4] Oslo Univ Hosp, Oslo, Norway
[5] Marien Hosp Duesseldorf, Dusseldorf, Germany
[6] HELIOS Klinikum Berlin Buch, Sarcoma Ctr Berlin Brandenburg, Berlin, Germany
[7] Univ Munich, Univ Hosp Grosshadern, Munich, Germany
[8] Univ Bonn, Bonn, Germany
[9] Univ Gottingen, D-37073 Gottingen, Germany
[10] Krankenhaus NW Frankfurt, Frankfurt, Germany
[11] Sahlgrens Univ Hosp, Gothenburg, Sweden
[12] Haukeland Hosp, Oslo, Norway
[13] Oulu Univ Hosp, Oulu, Finland
[14] Helsinki Univ Hosp, Helsinki, Finland
[15] 4Pharma, Turku, Finland
[16] Univ Klinikum Mannheim, Mannheim, Germany
[17] Lund Univ, Lund, Sweden
[18] HELIOS Klinikum Bad Saarow, Sarcoma Ctr Berlin Brandenburg, Bad Saarow Pieskow, Germany