Additional file 2 of Systematic review of Mendelian randomization studies on risk of cancer

Additional file 2: File S1. List of excluded studies and reason for exclusion. File S2. List of distinct exposures per exposure category. File S3. Evidence base. Table S1. Description of instrument characteristics by exposure category. Table S2. Summary results of the main and sensitivity Mendelian randomization (MR) analyses by exposure category and cancer group. Table S3. Grading of the evidence based on the sensitivity analysis by excluding the results from the MR-Egger test.附加文件2：文件S1。排除研究清单及排除原因。文件S2：按暴露类别划分的独特暴露因素清单。文件S3：证据库。表S1：按暴露类别划分的工具特征描述。表S2：按暴露类别与癌症分组划分的主分析及敏感性孟德尔随机化（Mendelian randomization, MR）分析汇总结果。表S3：基于剔除MR-Egger检验结果的敏感性分析的证据分级。