Chinese Journal of Perinatal Medicine, Volume 15, Issue 2,2012, Pages 119-120, doi:10.3760/cma.j.issn.1007-9408.2012.02.012
Chinese Journal of Perinatal Medicine, Volume 15, Issue 2,2012, Pages 73-75, doi:10.3760/cma.j.issn.1007-9408.2012.02.003
Chinese Journal of Perinatal Medicine, Volume 15, Issue 2,2012, Pages 113-118, doi:10.3760/cma.j.issn.1007-9408.2012.02.011
Chinese Journal of Perinatal Medicine, Volume 15, Issue 2,2012, Pages 85-90, doi:10.3760/cma.j.issn.1007-9408.2012.02.006
Chinese Journal of Perinatal Medicine, Volume 15, Issue 2,2012, Pages 80-84, doi:10.3760/cma.j.issn.1007-9408.2012.02.005