1. Department of Radiation Oncology, Baylor College of Medicine, Houston, Texas, USA
2. Department of Endocrinology, Xinqiao Hospital, Third Military Medical University, Chongqing, China
3. Department of Otolaryngology - Head and Neck Surgery, Baylor College of Medicine, Houston, Texas, USA
4. Department of Medicine, Section on Pulmonary and Critical Care Medicine, Baylor College of Medicine, Houston, Texas, USA
5. MD Anderson Cancer Center, University of Texas, Houston, Texas, USA