Affiliation: | 1. Department of Medicine, University Hospital, Uppsala, Sweden.;2. Department of Diagnostic Radiology, University Hospital, Uppsala, Sweden.;3. Department of Thoracic Surgery, University Hospital, Uppsala, Sweden.;1. School of Economic and Management, China University of Petroleum (East China), Qingdao, Shandong 266580, PR China;2. School of Management & Economics, Beijing Institute of Technology, Haidian District, Beijing, 100081, PR China |