1. Department of Surgery, Kuopio University Hospital, Kuopio, Finland.
2. Department of Clinical Physiology and Nuclear Medicine, Kuopio University Hospital, Kuopio, Finland.
3. Division of Nuclear Medicine, Helsinki University Central Hospital, Helsinki, Finland.
4. Department of Surgery, Päijät-Häme Central Hospital, Lahti, Finland.
5. Institute of Biomaterials, Tampere University of Technology, Tampere, Finland.