title: Re: Hepatitis B Vaccine Coverage and the Immune Response in Children under ten years old in Sana'a, Yemen-We need to work much harder to control hepatitis B virus infection in developing countries.
authors.affiliation: Baqiyatallah Research Center for Gastroenterology and Liver Disease, Tehran, Iran.
authors.forename: Seyed-Moayed
authors.initials: SM
authors.lastname: Alavian
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