1. Department of Vascular Surgery, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250021, People's Republic of China
2. Department of Cardiology, Xijing Hospital, Fourth Military Medical University, 169 West Changle Road, Xi'an 710032, People's Republic of China
3. Department of Vascular Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266000, People's Republic of China