Chinese Journal of Perinatal Medicine, Volume 18, Issue 2,2015, Pages 94-100, doi:10.3760/cma.j.issn.1007-9408.18.02.003
Chinese Journal of Perinatal Medicine, Volume 18, Issue 2,2015, Pages 134-136, doi:10.3760/cma.j.issn.1007-9408.18.02.011
Chinese Journal of Perinatal Medicine, Volume 18, Issue 2,2015, Pages 81-86, doi:10.3760/cma.j.issn.1007-9408.18.02.001
Chinese Journal of Perinatal Medicine, Volume 18, Issue 2,2015, Pages 117-122, doi:10.3760/cma.j.issn.1007-9408.18.02.007