@article{oai:soar-ir.repo.nii.ac.jp:00004041, author = {Tanaka, E and Matsumoto, A and Takeda, N and Li, TC and Umemura, T and Yoshizawa, K and Miyakawa, Y and Miyamura, T and Kiyosawa, K}, issue = {4}, journal = {Journal of viral hepatitis}, month = {Jul}, note = {The definitive version is available at www.blackwell-synergy.com, Article, Journal of Viral Hepatitis. 12(4): 439-442 (2005)}, pages = {439--442}, title = {Age-specific antibody to hepatitis E virus has remained constant during the past 20 years in Japan}, volume = {12}, year = {2005} }