Bifurcation CTO recanalization with contemporary antegrade and retrograde techniques in a patient with two chronically occluded coronary arteries - Nikolaos V. Konstantinidis, MD, MSc; Georgios Sofidis, MD, PhD; Vasileios Kolettas, MD; Haralambos Karvounis, MD, PhD; Georgios Sianos, MD, PhD, FESC (Hellenic Journal of Cardiology, 2016)