Chinese Journal of Perinatal Medicine, Volume 14, Issue 12,2011, Pages 748-750, doi:10.3760/cma.j.issn.1007-9408.2011.12.014
Chinese Journal of Perinatal Medicine, Volume 14, Issue 12,2011, Pages 753-755, doi:10.3760/cma.j.issn.1007-9408.2011.12.016
Chinese Journal of Perinatal Medicine, Volume 14, Issue 12,2011, Pages 768-769, doi:10.3760/cma.j.issn.1007-9408.2011.12.020
Chinese Journal of Perinatal Medicine, Volume 14, Issue 12,2011, Pages 715, doi:10.3760/cma.j.issn.1007-9408.2011.12.003
Chinese Journal of Perinatal Medicine, Volume 14, Issue 12,2011, Pages 739-743, doi:10.3760/cma.j.issn.1007-9408.2011.12.010