clomid otc In this study, we collected GWAS summary statistics based on up to 375, 468 cancer cases and 530, 521 controls for fourteen types of cancer, including breast overall, estrogen receptor ER positive, and ER negative, colorectal, endometrial, esophageal, glioma, head neck, lung, melanoma, ovarian, pancreatic, prostate, and renal cancer, to characterize the shared genetic basis of cancer risk