Chinese Journal of Perinatal Medicine, Volume 16, Issue 3,2013, Pages 175-179, doi:10.3760/cma.j.issn.1007-9408.2013.03.010
Chinese Journal of Perinatal Medicine, Volume 16, Issue 3,2013, Pages 165-169, doi:10.3760/cma.j.issn.1007-9408.2013.03.007
Chinese Journal of Perinatal Medicine, Volume 16, Issue 3,2013, Pages 142-147, doi:10.3760/cma.j.issn.1007-9408.2013.03.003
Chinese Journal of Perinatal Medicine, Volume 16, Issue 3,2013, Pages 153-156, doi:10.3760/cma.j.issn.1007-9408.2013.03.005
Chinese Journal of Perinatal Medicine, Volume 16, Issue 3,2013, Pages 129-136, doi:10.3760/cma.j.issn.1007-9408.2013.03.001