1. Department of Pathology, Haartman institute, University of Helsinki, Finland.
2. Department of Surgery, Helsinki University Central Hospital, Helsinki, Finland.
3. Department of Pathology, HUSLAB, Helsinki University Central Hospital, Helsinki, Finland.
4. Department of Medicine, University of Colorado Anchutz Medical 15 Campus, Aurora, Colorado, USA.
5. Department of Pathology, University of Colorado Anchutz Medical 15 Campus, Aurora, Colorado, USA.