Complementary techniques for the reliable characterisation of tissue samples: A case study on pancreatic tumours analysed by means of X-ray fluorescence analysis and IR spectroscopy. - Frenzel, Katja; Kayser, Yves; Hornemann, Andrea; Kästner, Bernd; Hoehl, Arne; Mouratidis, Petros; Rivens, Ian; ter Haar, Gail; Beckhoff, Burkhard (PLoS ONE, 2024)