Percutaneous coronary intervention of chronic total occlusions involving a bifurcation: Insights from the PROGRESS-CTO registry oleh Ilias Nikolakopoulos, Evangelia Vemmou, Judit Karacsonyi, Khaldoon Alaswad, Dimitri Karmpaliotis, Nidal Abi Rafeh, Daniel Schimmel, Keith Benzuly, James D. Flaherty, Paul Poommipanit, Ahmed M. ElGuindy, M. Nicholas Burke, Emmanouil S. Brilakis