Chinese Journal of Perinatal Medicine, Volume 17, Issue 3,2014, Pages 148-151, doi:10.3760/cma.j.issn.1007-9408.2014.03.002
Chinese Journal of Perinatal Medicine, Volume 17, Issue 3,2014, Pages 156-159, doi:10.3760/cma.j.issn.1007-9407.2014.03.004
Chinese Journal of Perinatal Medicine, Volume 17, Issue 3,2014, Pages 204-206, doi:10.3760/cma.j.issn.1007-9408.2014.03.014
Chinese Journal of Perinatal Medicine, Volume 17, Issue 3,2014, Pages 191-195, doi:10.3760/cma.j.issn.1007-9408.2014.03.011
Chinese Journal of Perinatal Medicine, Volume 17, Issue 3,2014, Pages 212-215, doi:10.3760/cma.j.issn.1007-9408.2014.03.016