Whitmore TE, Peterson A, Holzman T, Eastham A, Amon L, McIntosh M, Ozinsky A, Nelson PS, Martin DB. Integrative analysis of N-linked human glycoproteomic data sets reveals PTPRF ectodomain as a novel plasma biomarker candidate for prostate cancer. J Proteome Res. 2012 May 04;11(5):2653–65. doi: 10.1021/pr201200n. PMID: 22494190.