Infection by Helicobacter pylori cytotoxin-A-associated antigen-positive strains is associated with iron deficiency anemia in a longitudinal birth cohort in Brazil

巴西一项纵向出生队列研究表明，幽门螺杆菌细胞毒素A相关抗原阳性菌株感染与缺铁性贫血相关。