1. Department of Internal Medicine 2, Hamamatsu University School of Medicine, Hamamatsu, Japan.
2. Department of Emergency Medicine, Hamamatsu University School of Medicine, Hamamatsu, Japan.
3. Department of Otorhinolaryngology–Head and Neck Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan.
4. Department of Medical Technology, Kobe-Tokiwa University, Kobe, Japan.