1. Biomedical Research Institute Pusan National University Hospital Busan Korea
2. Biobehavioral Research Centre Mo‐Im Kim Nursing Research Institute College of Nursing Yonsei University Seoul Korea
3. Pusan National University Medical Research Institute Pusan National University School of Medicine Pusan National University Yangsan Korea
4. Department of Otorhinolaryngology‐Head and Neck Surgery Pusan National University School of Medicine Pusan National University Busan Korea
5. Department of Nuclear Medicine and Biomedical Research Institute Pusan National University Hospital Busan Korea
6. Department of Internal Medicine and Biomedical Research Institute Pusan National University Hospital Busan Korea