[1] Univ Hosp Schleswig Holstein, Kiel, Germany
[2] Univ Salamanca, Salamanca, Spain
[3] IBSAL, Salamanca, Spain
[4] Portuguese Inst Oncol, Lisbon, Portugal
[5] Cytognos SL, Salamanca, Spain
[6] Univ Med Ctr Rotterdam, Rotterdam, Netherlands
[7] Univ Paris 05, Paris, France
[8] Leeds Teaching Hosp, St James Inst Oncol, Leeds, W Yorkshire, England