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MALDI-TOF IMS of formalin-fixed paraffin-embedded (FFPE, top row) and frozen (bottom row) ovarian carcinoma. FFPE sections were treated with antigen retrieval. Frozen sections were washed using a previously described protocol. Both sections were digested with trypsin and coated with CHCA matrix using an ImagePrep station. Figure reprinted, with permission, from Gustafsson et al. 2010 [64]. Scale bars = 2 mm.
