Chinese Journal of Perinatal Medicine, Volume 15, Issue 9,2012, Pages 575-576, doi:10.3760/cma.j.issn.1007-9408.2012.09.018
Chinese Journal of Perinatal Medicine, Volume 15, Issue 9,2012, Pages 533-538, doi:10.3760/cma.j.issn.1007-9408.2012.09.005
Chinese Journal of Perinatal Medicine, Volume 15, Issue 9,2012, Pages 526-532, doi:10.3760/cma.j.issn.1007-9408.2012.09.004
Chinese Journal of Perinatal Medicine, Volume 15, Issue 9,2012, Pages 561-564, doi:10.3760/cma.j.issn.1007-9408.2012.09.012
Chinese Journal of Perinatal Medicine, Volume 15, Issue 9,2012, Pages 518-520, doi:10.3760/cma.j.issn.1007-9408.2012.09.002