1Akihiko Okumura,Tetsuya Ishikawa,Kentaro Yoshioka,Ryugo Yuasa,Yoshitaka Fukuzawa,Shinichi Kakumu. Mutation at codon 130 in hepatitis B virus (HBV) core region increases markedly during acute exacerbation of hepatitis in chronic HBV carriers[J] 2001,Journal of Gastroenterology(2):103~110