Plasma Choline as a Diagnostic Biomarker in Slow Coronary Flow oleh Yuan-Ting Zhu, Ling-Ping Zhu, Zhen-Yu Wang, Xue-Ting Qiu, Wan-Zhou Wu, Wei-Wang Liu, Yu-Yu Feng, Wen-Kai Xiao, Xin Luo, Zhen-Yu Li, Chuan-Chang Li