[1] Univ Gothenburg, Dept Pathol, Sahlgrenska Canc Ctr, SE-40530 Gothenburg, Sweden
[2] Sahlgrens Univ Hosp, Dept Clin Pathol & Cytol, Gothenburg, Sweden
[3] Umea Univ, Sect Pathol, Dept Med Biosci, Umea, Sweden
[4] Univ Birmingham, Sch Canc Sci, Sch Med, Dept Musculoskeletal Pathol, Birmingham B15 2TT, W Midlands, England