TY - Front. Med. A1 - Yingchen Li,Guoheng Hu,Qilai Cheng T1 - Implantation of human umbilical cord mesenchymal stem cells for ischemic stroke: perspectives and challenges Y1 - 2015-03-02 JF - Frontiers of Medicine JO - Front. Med. SP - 20 EP - 29 VL - 9 IS - 1 UR - https://academic.hep.com.cn/fmd N1 - 10.1007/s11684-014-0371-x ER -