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Number of c-fos mRNA-positive cells per section (0.01 mm) in the unilateral NTS determined 45 min after IG administration of NaCl (0.15 M), HCl (0.5 M), vehicle (Veh) and capsaicin (Cap, 0.64 and 3.2 mM). Means + SEM, n as indicated. * P < 0.05 versus Veh, ** P < 0.01 versus NaCl.
