CHINESE JOURNAL OF STOMATOLOGY, Volume 39, Issue 4,2004, Pages 332, doi:10.3760/j.issn:1002-0098.2004.04.055
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CHINESE JOURNAL OF STOMATOLOGY, Volume 39, Issue 4,2004, Pages 315-315, doi:10.3760/j.issn:1002-0098.2004.04.037