Chun-lei Dong

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To an organisation, centralized Internet filtering and blocking is very important for a couple of reasons. With the flooding of pornographic materials on the Web, educators and parents would like to block these offensive materials from their children. Companies also want to reduce the amount of work time that its employees spend on non-productive Web(More)
BACKGROUND Based on differences in the virus nucleotide sequence, hepatitis B virus (HBV) genotypes are presently divided into genotypes A-H. The geographic distributions of HBV genotypes differ in countries and regions. To determine the general characteristics of their distributions in the mainland of China, we reviewed articles on HBV genotypes published(More)
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