Chinese Journal of Perinatal Medicine, Volume 16, Issue 11,2013, Pages 687-689, doi:10.3760/cma.j.issn.1007-9408.2013.11.012
Chinese Journal of Perinatal Medicine, Volume 16, Issue 11,2013, Pages 668-672, doi:10.3760/cma.j.issn.1007-9408.2013.11.008
Chinese Journal of Perinatal Medicine, Volume 16, Issue 11,2013, Pages 656-659, doi:10.3760/cma.j.issn.1007-9408.2013.11.006
Chinese Journal of Perinatal Medicine, Volume 16, Issue 11,2013, Pages 701-704, doi:10.3760/cma.j.issn.1007-9408.2013.11.016
Chinese Journal of Perinatal Medicine, Volume 16, Issue 11,2013, Pages 677-681, doi:10.3760/cma.j.issn.1007-9408.2013.11.010