Pająk, Andrzej, Department of Epidemiology and Population Studies, Institute of Public Health, Jagiellonian University Medical College, Krakow, Poland Pajak, Andrzej Pająk, Andrzej Pająk, Iwona Pająk, Jacek Pająk, Jacek, Chair and Department of Children's Cardiology, Medical University of Silesia, Katowice, Poland. Pajkowski, Marcin Pakkirisamy, Gobu, Jawaharlal Institute of Postgraduate Medical Education and Research Pal, Raveen S., Queen's University Pal, Raveen S., Kingston General Hospital, Kingston, ON, Canada (Canada) Pala, Barbara Pala, Massimo Pala, Selcuk Palacios-Rubio, Julián Palandri Chagas, Antônio Carlos, São Paulo University, Instituto do Coração (INCOR) Palaniswamy, Chandrasekar, Westchester Medical Center, New York Medical College Palazzolo, Jorge Palazzuoli, Alberto, Dept of Internal Medicine and Metabolic Diseases, Cardiology Section University of Siena, Le Scotte Hospital Viale Bracci Siena Italy Palczewski, Piotr Paliege, Robert, Dept. of Cardiology Klinikum Kassel Palka, Ilona Palkowski, Aleksander Palmerini, Elisabetta Palmerini, Tullio, Department of Cardiology, University of Bologna Palmiero, Pasquale, ASL Brindisi, Cardiology Equipe, District of Brindisi, Italy