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Figure 6 Co-location of adrenergic and cholinergic nerves at a tissue level (A1 to A5) and at a cellular level within nerve fiber trunks (B1 to B2, D1 to D3) and cardiac ganglia (C1 to C2, E1 to E3). See text for explanations. ChAT = anticholine acetyltransferase; TH = antityrosine hydroxylase.