Comparison of the capability of risk stratification evaluation between two- and three-dimensional speckle-tracking strain in pre-capillary pulmonary hypertension oleh Bing-Yang Liu, Wei-Chun Wu, Qi-Xian Zeng, Zhi-Hong Liu, Li-Li Niu, Yue Tian, Qin Luo, Zhi-Hui Zhao, Rui-Lin Quan, Jing-Ru Lin, Hao Wang, Jian-Guo He, Chang-Ming Xiong