Comparison of the Predictive Value of GAP Staging and CPI for Risk of Death in Patients with Idiopathic Pulmonary Fibrosis 
CAI Bo,CHEN Xianqiu,YANG Wenlan,YANG Guanghong,HUANG Jin,QUAN Hua,FENG Yonghong
Chinese General Practice . 2021, (35): 4485 -4491 .  DOI: 10.12114/j.issn.1007-9572.2021.00.598