1. Dermatology Private Practice; Polish Dermatoscopy Group, Poznań, Poland
2. Gandaki Medical College, Pokhara, Nepal
3. Histology and Embryology Department, Poznań University of Medical Sciences, Poznań, Poland
4. Cutaneous Histopathology and Immunopathology Section, Department of Dermatology, Poznań University of Medical Sciences, Poznań, Poland