前言：　　胃癌是消化道最常见的恶性肿瘤之一。在世界范围内，在男性中其死亡率居癌症死因的第二位，而在女性中其死亡率居癌症死因第三......

Embryonic stem cells are unique in their abilities of self-renewal and to differentiate into many, if not all, cellular ......