1. Department of Anesthesiology; Kaohsiung Medical University Hospital; Kaohsiung Medical University; Kaohsiung Taiwan
2. Division of Oral Maxillofacial Surgery; Department of Dentistry; Kaohsiung Medical University Hospital; Kaohsiung Medical University; Kaohsiung Taiwan
3. Department of Anesthesiology; College of Medicine; Kaohsiung Medical University; Kaohsiung Taiwan