Pilypienė, Ingrida, Department of Neonatology, Vilnius University Hospital ‘‘Santariškių Klinikos’’, Vilnius, Lithuania Pineyro-Cantu, Alfredo Pinkas, Jaroslaw Pinkas, Jarosław, Center of Postgraduate Medical Education, 99/103 Marymoncka St., 01-813 Warsaw, Poland. Pinkas, Jarosław Pinkas, Jarosław, Centre of Postgraduate Medical Education, Kleczewska st. 61/63, 01-826 Warszawa, Poland Pinkier, Iwona Piórkowski, Robert, Medical University of Warsaw Piorunek, Tomasz Piotr, Magnowski Piotrowiak, Ilona Piotrowicz, Grzegorz Piotrowska, Aleksandra Piotrowska, Katarzyna Piotrowska-Gwizdak, Angelika Piotrowski, Igor Piotrowski, Krzysztof Piotrowski, Krzysztof (Poland) Piotrowski, Wojciech J. Pires, Pedro, Department of Maternal and Child, University of Pernambuco (UPE) Piriyev, Elvin Piróg, Magdalena Maria, Department of Gynecological Endocrinology, Jagiellonian University Medical College, Krakow, Poland Pisarek-Miedzińska, Danuta Pisarska-Krawczyk, Magdalena Piskorowska, Karolina