1. International Agency for Research on Cancer, Lyon, France.
2. The Korea Central Cancer Registry, National Cancer Center, Goyang, Korea.
3. National Cancer Control Institute, National Cancer Center, Goyang, Korea.
4. Research Institute, National Cancer Center, Goyang, Korea.
5. Center for Liver Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea.
6. Department of Parasitology, Seoul National University, College of Medicine, Seoul, Korea.