[1] Ctr Jean Perrin, Clermont Ferrand, France
[2] Univ Hosp Motol, Prague, Czech Republic
[3] Nemonice Poliklin, Kladno, Czech Republic
[4] Univ Hosp, Plzen, Czech Republic
[5] Masaryk Inst Oncol, Brno, Czech Republic
[6] FD Roosewelta, Banska Bystrica, Slovakia
[7] Fak Thomayerova Nemocnice, Prague, Czech Republic
[8] Univ Hosp L Pasteura, Kosice, Slovakia
[9] Thomayer Mem Teaching Hosp, Prague, Czech Republic