Ochotny, Tomasz Smukowski i Romuald Ochotny, Zofia Oko-Sarnowska i Romuald Oda, Seitaro Odening, Katja Odigie-Okon, Esosa, Department of Medicine, Yale University (Bridgeport Hospital), Bridgeport, CT, USA Odrowąż-Sypniewska, Grażyna Dymek i Grażyna Odrowąż-Sypniewska, Jacek Kubica i Grażyna Odrowąż-Sypniewska, Zofia Grąbczewska i Grażyna Oduncu, Vecih of POLKARD-HF, on behalf of the participants Ofek, Hadas Oflaz, Huseyin, Professor. Department of Cardiology, Istanbul School of Medicine, Istanbul University, Istanbul, Turkey Ogeng’o, Julius A., Department of Human Anatomy, University of Nairobi, Kenya Ogorzeja, Wojciech Ogura, Riyo Oguzhan, Abdurrahman Oh, Byung-Hee Oh, Il-Young Oh, Ji-Eun Oh, Ju-Hyeon Oh, Jun-Hyok Oh, Jun-Hyok, Pusan National University Hospital (Korea, Republic Of) Oh, Jun-Hyok Oh, Pyung Chun Oh, Seok Kyu