Ultrastructure and phagocytotic function of human placental mesenchymal stem cells  
Sha Wen-qiong, She Rui-lian, Wang Zi-neng, Ke Ru
Chinese Journal of Tissue Engineering Research . 2015, (14): 2230 -2235 .  DOI: 10.3969/j.issn.2095-4344.2015.14.017