Differentially hypomethylated cell-free dna and coronary collateral circulation

HIGHLIGHTS

• who: Jongseong Ahn from the All patients included in this study visited the Severance Hospital from January , to August , and received coronary angiography for chest discomfort or pain [36]We used the patient data deposited in the Cardiovascular Genome Center database of the Yonsei University College of Medicine, Korea. Patients who presented with chronic total occlusion of at least one epicardial coronary artery were selected for this study. This study conformed to the Declaration of Helsinki and obtained approval from the Institutional Review Board of Severance Hospital, Seoul, Korea (4-2019-0880). Trained nurses collected clinical data . . .
  

   

  

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