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Pretreatment (a) and posttreatment (b) pictures of flat and smooth vocal fold leukoplakia (complete response). Pretreatment (c) and posttreatment (d) pictures of elevated and smooth vocal fold leukoplakia (complete response). Pretreatment (e) and posttreatment (f) pictures of rough vocal fold leukoplakia (no response). Black arrowheads indicate the three types of vocal fold leukoplakia.
