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Serum calcitonin and CEA concentrations per patient over time. (a) Serum calcitonin over time for all patients, (b) close-up of figure (a) for patients 2, 5, and 6, (c) serum CEA for all patients, and (d) close-up of figure (c) for patients 1, 4, 5, 6, and 7.
