1. Department of Dermatology, Medical University of Lodz, 90-647 Lodz, Poland
2. Department of Hematology, Medical University of Lodz, 93-510 Lodz, Poland
3. Department of General Hematology, Copernicus Memorial Hospital, 93-510 Lodz, Poland
4. Department of Pathomorphology, Medical University of Gdansk, 80-214 Gdansk, Poland