Figure 4.
Principle component analysis results of samples in (A) the training set, GSE36668 (green, serous carcinoma; red, borderline carcinoma; blue, normal ovary tissue) and (B) the validation set, GSE18520 (red, ovarian cancer; green, normal ovary tissue), based on the combined differential expression levels of seven lncRNAs. lncRNA, long non-coding RNA.