Analysis of the Correlation Between the Ratio of Monocytes to High-Density Lipoprotein Cholesterol and in-Stent Restenosis in Patients with Premature Coronary Heart Disease oleh Bo-Wen Chen BS, Jia-Jing Liu BS, Jun-Hui Xing MD, Heng-Dao Liu MD, Yu-Zhen Wei MD, Xiao-Fei Xue MD, He-Ping Gu MD, Hai-Long Tao MD