Chinese Journal of Perinatal Medicine, Volume 18, Issue 3,2015, Pages 229-231, doi:10.3760/cma.j.issn.1007-9408.2015.03.013
Chinese Journal of Perinatal Medicine, Volume 18, Issue 3,2015, Pages 161-167, doi:10.3760/cma.j.issn.0529-567x.2015.03.002.001
Chinese Journal of Perinatal Medicine, Volume 18, Issue 3,2015, Pages 176-181, doi:10.3760/cma.j.issn.1007-9408.2015.03.003
Chinese Journal of Perinatal Medicine, Volume 18, Issue 3,2015, Pages 227-229, doi:10.3760/cma.j.issn.1007-9408.2015.03.012
Chinese Journal of Perinatal Medicine, Volume 18, Issue 3,2015, Pages 232-233, doi:10.3760/cma.j.issn.1007-9408.2015.03.014