1. Department of Dermatology, Pediatric Dermatology and Oncology Clinic, Medical University of Lodz, 90-419 Lodz, Poland
2. Department of Pediatrics, Faculty of Medicine and Health Sciences, Andrzej Frycz Modrzewski Krakow University, 30-705 Krakow, Poland
3. Department of Dermatology, Venereology and Allergology, Wroclaw Medical University, 50-368 Wroclaw, Poland