1 Department of Nuclear Medicine, The Netherlands Cancer Institute-Antoni van Leeuwenhoek (NKI-AVL), Plesmanlaan 121, 1066, CX, Amsterdam, the Netherlands. w.vogel@nki.nl.
2 Nuclear Research and consultancy Group (NRG), Petten, Netherlands.
3 Department of Nuclear Medicine, The Netherlands Cancer Institute-Antoni van Leeuwenhoek (NKI-AVL), Plesmanlaan 121, 1066, CX, Amsterdam, the Netherlands.