Heterogeneity test for studies of each genotype in different cancer types (as of March 2012) with Cochrane’s Q-test and the quantity I2.

#Stratified by ethnicity, including Asian, European, and others (North American and African).⋇20;Stratified by controls, including benign prostatic hyperplasia (BPH), BPH or visitors or requesting vasectomy (BPH and others), benign urological patients matched, chronic atrophic gastritis (CAG), free of colorectal cancer (free of CRC), free of cancer, healthy, healthy and BPH, healthy and free of cancer, healthy matched, kindreds, and normal peritumoral tissues.