Petrica, Ligia Petrovic, Vesna PetrovicovĂĄ, JozefĂ­na Piacibello, Wanda, Laboratory of Medical Oncology, Department of Oncological Sciences, IRCC Institute for Cancer Research and Treatment, University of Turin Medical School, Candiolo, Turin, Italy Piasecka, M, Laboratory of Embryology, Pomeranian Medical University, Szczecin, Poland Piasecka, M, Department of Histology and Embryology, Pomeranian Medical University, Szczecin, Poland Piasecka, Malgorzata, Department of Histology and Developmental Biology, Pomeranian Medical University in Szczecin, Poland Piasecka, Malgorzata Piasecka, Małgorzata Piasecki, Egbert Piaseczna-Piotrowska, Anna Małgorzata Piastowska-Ciesielska, Agnieszka W. Pidsudko, Zenon, Department of Animal Anatomy, Faculty of Veterinary Medicine, University of Warmia and Mazury, Olsztyn-Kortowo II, Poland Pidsudko, Zenon, Department of Animal Anatomy, Faculty of Veterinary Medicine, University of Warmia and Mazury, Olsztyn, Poland. (Poland) Piechnik, Beata Piekarska, Agnieszka Piekarska, Barbara Piekarz, Paweł, Department of Minimally Invasive Surgery and Proctology, Wroclaw Medical University, Borowska Str. 213, 50-556 Wroclaw, Poland Pienkowska-Grela, Barbara Piersiak, Tomasz Pierzchała, Władysław Pietkiewicz, Jadwiga Pietruczuk, K, Department of Pathophysiology, Medical University of Gdańsk, Poland Pietruska, Małgorzata Pietruszewska, Wioletta, Department of Otolaryngology, Chair of Otolaryngology, Medical University of Lodz, Poland