Paciello, O Paciello, Orlando, Department of Pathology and Animal Health, University of Naples Federico II, Naples, Italy Paczek, Leszek Paczkowska, E Paduch, Robert Paduch, Roman, Department of Virology and Immunology, Institute of Microbiology and Biotechnology, Maria Curie-Skłodowska University, Lublin, Poland Paduch, Roman Paduch, Roman Páez-Arenas, Araceli Pagonopoulou, Olga, Laboratory of Physiology, Democritus University of Thrace Pagonopoulou, Olga Pairault, Catherine Pajak, Beata, Department of Cell Ultrastructure, Medical Research Centre, Polish Academy of Sciences, Warsaw, Poland Pajor, Anna Pajtasz-Piasecka, Elzbieta Pajtasz-Piasecka, Elżbieta Paleń, Piotr Palka, Jerzy Palmirotta, Raffaele Paluchowska, Paulina, Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Jagiellonian University Medical College, Krakow, Poland Pameijer, Cornelis H., School of Dental Medicine, University of Connecticut, Farmington, USA Pan, Bochen Pan, Jie Pan, Quanli Pan, Ruijie