Tokyo Medical and Dental Univetsity, Tokyo, Japan
Gastroenterology and Hepatology, Tokyo Medical and Dental UNIV, Tokyo, Japan
Tokyo Medical and Dental University, Tokyo, Japan
TMJ Clinic, Tokyo Medical and Dental University, Tokyo, Japan
Dept. Oral health promotion, Tokyo medical and dental university, Yushima Bunkyo-ku, Tokyo, Japan
Hokkaido University Hospital, Sapporo, Hokkaido, Japan
The University of Tokyo Hospital, Bunkyo-ku, Tokyo, Japan
Tsukuba University Hospital, Tsukuba, Ibaraki, Japan