[1] Portuguese Inst Oncol, Dept Med Oncol, Lisbon, Portugal
[2] Ctr Hosp Lisboa Ocidental, Dept Med Oncol, Lisbon, Portugal
[3] Portuguese Inst Oncol, Dept Neurol, Lisbon, Portugal
[4] Portuguese Inst Oncol, Clin Trials Unit, Lisbon, Portugal
[5] Natl Canc Registry, Lisbon, Portugal