D-Dimer to Fibrinogen Ratio as a Novel Prognostic Marker in Patients After Undergoing Percutaneous Coronary Intervention: A Retrospective Cohort Study oleh Yan Bai MS, Ying-Ying Zheng MD, PhD, Jun-Nan Tang MD, PhD, Xu-Ming Yang MS, Qian-Qian Guo MS, Jian-Chao Zhang MS, Meng-Die Cheng MS, Feng-Hua Song MS, Kai Wang MS, Zeng-Lei Zhang MS, Zhi-Yu Liu MS, Li-Zhu Jiang MS, Lei Fan MS, Xiao-Ting Yue MS, Xin-Ya Dai MS, Ru-Jie Zheng MS, Jin-Ying Zhang MD, PhD