1. Department of Internal Medicine, Hirose Hospital, Sagamihara 252-0105, Kanagawa, Japan
2. Department of Forest Management, Forestry and Forest Products Research Institute, Tsukuba 305-8687, Ibaraki, Japan
3. Clinical Research Center, Hirose Hospital, Sagamihara 252-0105, Kanagawa, Japan
4. Department of Home Care Medicine Hirose Hospital, Sagamihara 252-0105, Kanagawa, Japan