Human umbilical cord mesenchymal stem cells influence the proliferation and apoptosis of endometrial cells 
Xu Li-nan1, Xu Bing-nan2, Chen Shu-qin1, He Ke1, Cai Jian1
Chinese Journal of Tissue Engineering Research . 2012, (10): 1765 -1768 .  DOI: 10.3969/j.issn.1673-8225.2012.10.013