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Views of the ulcer on the right pharyngeal arch just before the 1st PBM procedure (A), on the 4th day before the 2nd PBM procedure (B), on the 7th day before the 3rd PBM (C), on the 14th day before the 4th PBM (D), and on the 21st before the 7th and last PBM treatment (E).
