Tibiopedal and distal femoral retrograde vascular access for challenging chronic total occlusions: predictors for technical success, and complication rates in a large single-center cohort. - Grözinger, Gerd; Hallecker, Jan; Grosse, Ulrich; Syha, Roland; Ketelsen, Dominik; Brechtel, Klaus; Lescan, Mario; Nikolaou, Konstantin; Artzner, Christoph (European Radiology, 2021)