Kempa, Maciej Kempisty, Bartosz Kenny, Damien Kępka, Cezary Kępski, Roman Keren, Gad, TEL AVIV SOURASKY MEDICAL CENTER Kern, Adam, Warmińskie Centrum Kardiologii Wojewódzkiego Szpitala Specjalistycznego w Olsztynie Kern, Adam, Department of Cardiology, Voivodal Specialist Hospital in Olsztyn, Poland; Faculty of Medical Sciences, University of Warmia and Mazury, Olsztyn, Poland (Poland) Kern, Adam Kern, Adam, Faculty of Medical Sciences University of Warmia and Mazury, Olsztyn, Poland Kern, Adam Kervancioglu, Mehmet Keshavarzi, Friedon, MD Keskin, Mehmet Kessels, Jolien Ketcha, Arthur, School of Health Sciences, Catholic University of Central Africa, Yaoundé, Cameroon Khachatryan, Lusine Khadem, Aliasghar Khairina, W.M.N. Wan Khalaph, Moneeb Khalil, Wael, Cardiology Department, Faculty of Medicine, Zagazig University, Egypt Khamisy-Farah, Rola Khan, Abdullah Khan, Arfaat, Henry Ford Hospital, Detroit, MI Khan, Faris, University of Pittsburgh Medical Center