Hawro, Piotr Hay, Anna Hayiroglu, Mert Ilker Hayıroğlu, Mert İlker Hayıroğlu, Selin Cilli Hazirolan, Tuncay, Hacettepe University Faculty of Medicine Hałas, Katarzyna, Military Institut of Medicine Hałas, Katarzyna, Department of Cardiology and Internal Diseases, Military Institute of Medicine, Warsaw, Poland (Poland) Hałgas, Kacper He, Chengyu He, Jixian, Department of Cardiovasology, the Central Hospital of Guangyuan, Guangyuan, Sichuan, P.R.China, 628000. He, Wenfeng, Department of Cardiology, Affiliated Hospital of North Sichuan Medical College He, Ye He, Yuanjun, Department of Cardiovasology, the Central Hospital of Guangyuan, Guangyuan, Sichuan, P.R.China, 628000. Head, Stuart J. Head, Stuart J. (The Netherlands) Heba, Grzegorz Heba, Grzegorz Heciak, Jacek Hedayat, Daryoosh Kamal Hedley, Paula L. Heidbuchel, Hein Heidbuchel, Hein Heidrich, Felix M., Heart Center Dresden at Technische Universität Dresden Dept. of Cardiology Fetscherstr. 76 01307 Dresden GERMANY Heinze-Paluchowska, Sylwia, Instytut Fizyki Jądrowej Polskiej Akademii Nauk