1. Department of Thoracic Surgery, Affiliated Hospital of Inner Mongolia Medical University, Hohhot City, Inner Mongolia Autonomous Region, 010000, P. R. China
2. Department of Thoracic Surgery, Inner Mongolia Armed Police Hospital, Hohhot, Inner Mongolia, 010000, China
3. Department of Pathology Department, Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia, 010000, China