Preliminary study on the short-term changes of pulmonary perfusion after a single balloon pulmonary angioplasty in patients with chronic thromboembolic pulmonary hypertension oleh Peng Hou, Hai-Ming Chen, Si-Yan Lin, Wen-Liang Guo, Peng-Hao Chen, Jie-Long Lin, Xiao-Feng Wu, Chun-Li Liu, Xin-Lu Wang, Cheng Hong