Recovery and maintenance of NESTIN expression in umbilical cord-MSC using a novel culture medium oleh Yuncheng Liu, Feidi Xiao, Xiang Hu, Zan Tang, Zeqin Fu, Xiao Liang, Guifang Zeng, Weijie Zeng, Yan Liao, Yuan Ren, Zhiyu Liu, Hao Peng, Qiuhong Mei, Muyun Liu