Intermittent demand refers to the specific demand pattern with frequent periods of zero demand. It occurs in a variety o......

目的：探讨外排泵ABC转运蛋白基因msbA和spab在幽门螺杆菌（Helicobacter pylori,H.pylori）多重耐药中的作用.方法：从临床上胃炎和消化性......