Chinese Journal of Perinatal Medicine, Volume 15, Issue 7,2012, Pages 433-435, doi:10.3760/cma.j.issn.1007-9408.2012.07.008
Chinese Journal of Perinatal Medicine, Volume 15, Issue 7,2012, Pages 448, doi:10.3760/cma.j.issn.1007-9408.2012.07.014
Chinese Journal of Perinatal Medicine, Volume 15, Issue 7,2012, Pages 443-444, doi:10.3760/cma.j.issn.1007-9408.2012.07.012
Chinese Journal of Perinatal Medicine, Volume 15, Issue 7,2012, Pages 438-440, doi:10.3760/cma.j.issn.1007-9408.2012.07.010