Chinese Journal of Perinatal Medicine, Volume 15, Issue 1,2012, Pages 39-42, doi:10.3760/cma.j.issn.1007-9408.2012.01.010
Chinese Journal of Perinatal Medicine, Volume 15, Issue 1,2012, Pages 60-62, doi:10.3760/cma.j.issn.1007-9408.2012.01.015
Chinese Journal of Perinatal Medicine, Volume 15, Issue 1,2012, Pages 37-38, doi:10.3760/cma.j.issn.1007-9408.2012.01.009
Chinese Journal of Perinatal Medicine, Volume 15, Issue 1,2012, Pages 63, doi:10.3760/cma.j.issn.1007-9408.2012.01.016
Chinese Journal of Perinatal Medicine, Volume 15, Issue 1,2012, Pages 1-2, doi:10.3760/cma.j.issn.1007-9408.2012.01.001