1. the Department of Infectious Diseases, Tokyo Metropolitan Bokutoh General Hospital
2. the Department of Infectious Diseases, Tokyo Metropolitan Komagome General Hospital
3. the Department of Infectious Diseases, Tokyo Metropolitan Ebara General Hospital
4. the Department of Internal Medicine, Kawasaki Municipal Hospital
5. the Department of Infectious Diseases, Osaka City General Hospital
6. the Department of Infectious Diseases, Kyoto City Hospital
7. the Department of Infectious Diseases, Yokohama Municipal Citizen's Hospital