biostudies-literatureUnknown38(33)Waltenberger JEuropean heart journal2556-2558https://www.ebi.ac.uk/biostudies/studies/S-EPMC5837796biostudies-literatureChronic refractory angina pectoris: recent progress and remaining challenges.PMC5837796Waltenberger JfalseChronic refractory angina pectoris: recent progress and remaining challenges.2017-01-01T00:00:00Z2017 Sep2025-04-19T18:26:36.642Z2025-04-19T18:26:36.642ZS-EPMC58377962890347710.1093/eurheartj/ehx421