Methods Male Kunming mouse 1 , 2 , 3 , 4 week after born during the development procedure and adult male kunmin g mouse, altogether 12, were divided into 2 groups.

• 方法采用出生1,2,3,4周雄性昆明小鼠的发育过程以及成年雄性昆明小鼠各2只,分成2组,第1组4只,第2组4只。