PPINGUIN: Peptide Profiling Guided Identification of Proteins improves quantitation of iTRAQ ratios. - Chris Bauer; Frank Kleinjung; Dorothea Rutishauser; Christian Panse; Alexandra Chadt; Tanja Dreja; Hadi Al-Hasani; Knut Reinert; Ralph Schlapbach; Johannes Schuchhardt (BMC Bioinform., 2012)