Editor:Hopton and MacPherson(1)are correct in noting that(1)attempts at masking are not always successful,hence(2) unsub......

研究方法对任一学科发展均具有基础性影响。伴随比较政治学对其他学科研究方法的吸收借鉴和自身发展，在学者应用过程中，无论是理论构......

AIM: To investigate the prevalence, risk factors, and selection of the study population for cholecystolithiasis in an ur......

The factors associated with an increase in gastric cardia adenocarcinoma are poorly understood. Environmental factors su......

偏倚是眼病抽样调查中常见的人为误差，是影响调查结果真实性与可靠性的主要原因。本文分析评论了我国眼病抽样调查中常见的几种偏倚......