1. School of Surgery, Institute of Medicine, Suranaree University of Technology, Nakhon Ratchasima, Thailand
2. Department of Surgery, Suranaree University of Technology Hospital, Nakhon Ratchasima, Thailand
3. School of Anesthesiology, Institute of Medicine, Suranaree University of Technology, Nakhon Ratchasima, Thailand
4. School of Radiology, Institute of Medicine, Suranaree University of Technology, Nakhon Ratchasima, Thailand