Chinese Journal of Perinatal Medicine, Volume 15, Issue 5,2012, Pages 310-311, doi:10.3760/cma.j.issn.1007-9408.2012.05.015
Chinese Journal of Perinatal Medicine, Volume 15, Issue 5,2012, Pages 288-290, doi:10.3760/cma.j.issn.1007-9408.2012.05.007
Chinese Journal of Perinatal Medicine, Volume 15, Issue 5,2012, Pages 308-309, doi:10.3760/cma.j.issn.1007-9408.2012.05.014
Chinese Journal of Perinatal Medicine, Volume 15, Issue 5,2012, Pages 264-266, doi:10.3760/cma.j.issn.1007-9408.2012.05.002
Chinese Journal of Perinatal Medicine, Volume 15, Issue 5,2012, Pages 291-293, doi:10.3760/cma.j.issn.1007-9408.2012.05.008