Jędrzejczyk-Patej, E., Pruszkowska-Skrzep, P., & Kalarus, Z. (2010). CRT in patients with heart failure in NYHA I-II class. Medycyna Faktow (J EBM), 3(4(9), 32-36. Retrieved from https://www.journalsmededu.pl/index.php/jebm/article/view/2562