1. Department of Respiratory Internal Medicine, Hiroshima University Hospital, Minami-ku, Hiroshima, Japan
2. Department of and Otolaryngology and Head and Neck Surgery, Hiroshima University Hospital, Minami-ku, Hiroshima, Japan
3. Department of Dermatology, Hiroshima University Hospital, Minami-ku, Hiroshima, Japan
4. Department of Urology, Hiroshima University Hospital, Minami-ku, Hiroshima, Japan
5. Department of Gastroenterological and Transplant Surgery, Hiroshima University Hospital, Minami-ku, Hiroshima, Japan