DNA methylation data for 489 high stage, high grade serous ovarian tumors and eight normal fallopian tube samples was obtained from http://tcga.cancer.gov/dataportal/. In addition, buffy coat samples from two female individuals were obtained. All data were generated with Illumina Infinium HumanMethylation 27 arrays, which interrogate 27,578 CpG sites located in proximity to the transcription start sites of 14,475 consensus coding sequencing in the NCBI Database (Genome Build 36). The level of DNA methylation at each probe was summarized with beta values ranging from 0 (unmethylated) to 1 (methylated) 58.
