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INTERNATIONAL JOURNAL OF PEDIATRICS, Volume 36, Issue 3,2009, Pages 228-231, doi:10.3760/cma.j.issn.1673-4408.2009.03.005
INTERNATIONAL JOURNAL OF PEDIATRICS, Volume 36, Issue 3,2009, Pages 244-246, doi:10.3760/cma.j.issn.1673-4408.2009.03.010