1 Karolinska University Hospital, Solna, Department of Pathology-Oncology, Cancer Center Karolinska, R8:00, Stockholm SE-171 76, Sweden. Electronic address: arne.ostman@ki.se.
2 Lund University, Department of Laboratory Medicine Malmö, Center for Molecular Pathology, Jan Waldenströms Gata 58, SE-20502 Malmö, Sweden.