1. Department of Spinal Surgery, Hiser Medical Center of Qingdao, Qingdao Hiser Hospital Affiliated to Qingdao University, Qingdao, China
2. Department of ICU, Affiliated Qingdao Central Hospital of Qingdao University, Qingdao Cancer Hospital, Qingdao, China
3. Department of Thoracic Surgery, Affiliated Qingdao Central Hospital of Qingdao University, Qingdao Cancer Hospital, Qingdao, China
4. Department of Endoscopic Diagnosis and Treatment, Qingdao Eighth People’s Hospital, Qingdao, China
5. Department of Clinical Laboratory, Yantaishan Hospital of Yantai, Yantai, China