1 Department of Medical Oncology, University Medical Centre Utrecht, Heidelberglaan 100, Utrecht 3584CX, the Netherlands. Electronic address: [email protected].
2 Department of Medical Oncology, Universitair Ziekenhuis Brussel, Laarbeeklaan 101, 1090 Brussel, Belgium.
3 Department of Medical Oncology, University Medical Centre Utrecht, Heidelberglaan 100, Utrecht 3584CX, the Netherlands.