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Kinetic study of PpIX emission of GICs. Both GIC7 and PG88 tumorspheres were treated at 50 and 100 µg/mL of 5-ALA and PpIX fluorescence was analyzed. Results show the mean ± SE of three independent experiments (n = 3) performed in triplicate and measured periodically until 30 h after 5-ALA administration.
