Expression of carbohydrate antigens a in control, Helicobacter pylori infected and Pteridium aquilinum treated with or without infection mice.

aStaining was graded in three categories: (-) negative, (+) positive, and (+ +) strongly positive.bFisher’s exact test (p-value); n.a. – not applicable.a. 染色结果分为三个等级：(-) 阴性（negative）、(+) 阳性（positive）及(++) 强阳性（strongly positive）。b. 采用Fisher确切概率法（Fisher’s exact test）进行统计学检验，报告p值（p-value）；n.a. 表示不适用（not applicable）。