摘要
肺炎球菌结合疫苗接种计划实施前后婴幼儿侵袭性肺炎球菌病发病情况的比较；牙科汞合金材料对儿童神经心理学和肾脏功能的影响：随机化临床试验；
Invasive pneumococcal disease among infants before and after introduction of pneumococcal conjugate vaccine;Neuropsychological and renal effects of dental amalgam in children： A randomized clinical trial
