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Bar graphs showing plasma concentrations of methoxytyramine (A) and metanephrine (B) in subgroups of patients with and without metastases according to adrenal versus extra-adrenal locations of primary tumors. Results are shown as geometric means±SE. a,b,cPresence of different alphabetic characters indicate significant differences (P<0.05) between groups, whereas presence of identical characters indicates lack of significant differences.
