1. Department of Clinical Pathology, Poznan University of Medical Sciences, Poznan, Poland
2. Department of Pathology, University Hospital of Lord’s Transfiguration, Partner of Poznan University of Medical Sciences, Poznan, Poland
3. Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
4. Department of Paediatric Oncology, Haematology, and Transplantology, Poznan University of Medical Sciences, Poznan, Poland