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. 2021 May 10;11:654300. doi: 10.3389/fonc.2021.654300

Figure 1.

Figure 1

Experimental workflow. Before tumor resection, patients received sodium fluorescein (NaFl) intravenously (i.v.). After fixation in 4% PFA and 30% sucrose immersion, the NaFl-stained tissue was embedded in Tissue-Tek OCT before cryosectioning. Frozen sections were then studied by fluorescence microscopy and spectroscopy measurements.