Balak, Aleksandra Balak, Michał Balak, Wojciech, II Katedra Kardiologii, Uniwersytet Mikołaja Kopernika w Toruniu, Collegium Medicum w Bydgoszczy, Szpital Uniwersytecki Nr 2, Bydgoszcz Balak, Wojciech, II Cardiology Clinic; University Hospital no 2; Collegium Medicum Nicolaus Copernicus University in Torun, Poland (Poland) Balak, Wojciech, Szpital Uniwersytecki nr 2 w Bydgoszczy Balak, Wojciech, 2nd Chair and Clinic of Cardiology, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, Poland Balak, Wojciech Balak, Wojciech Balanika, Marina Balasubramaniam, Richard N., Royal Bournemouth Hospital Balbay, Yucel Balcarek, Janusz Balcerzak, Marek Balcerzyk, Anna Balci, Bahattin Balci, Kevser G., Turkiye Yuksek Ihtisas Education and Research Hospital, Ankara, Turkey Balci, Mustafa M., Turkiye Yuksek Ihtisas Education and Research Hospital Balci, Mustafa M. Baldo, Marcelo Perim Baldus, Stephan Baldus, Stephan Balen, Sanja, 1. Department of Cardiology, University Hospital “Thalassotherapia Opatija”, Medical Faculty University of Rijeka; Croatia 2. Department of Internal medicine, University hospital Osijek, Medical Faculty JJ Strossmayer University of Osijek; Croatia Baliński, Marek Baliński, Marek Balogh, László