Chinese Journal of Perinatal Medicine, Volume 15, Issue 10,2012, Pages 577-579, doi:10.3760/cma.j.issn.1007-9408.2012.10.001
Chinese Journal of Perinatal Medicine, Volume 15, Issue 10,2012, Pages 616-618, doi:10.3760/cma.j.issn.1007-9408.2012.10.011
Chinese Journal of Perinatal Medicine, Volume 15, Issue 10,2012, Pages 580-583, doi:10.3760/cma.j.issn.1007-9408.2012.10.002
Chinese Journal of Perinatal Medicine, Volume 15, Issue 10,2012, Pages 599-604, doi:10.3760/cma.j.issn.1007-9408.2012.10.007
Chinese Journal of Perinatal Medicine, Volume 15, Issue 10,2012, Pages 595-598, doi:10.3760/cma.j.issn.1007-9408.2012.10.006