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Figure 2 Cardiac nerve density in dogs with left stellate ganglion subthreshold electrical stimulation (LSGS) and in normal control dogs (CNT). (Upper panel) Nerve density measured as the number of nerves per mm². (Lower panel) Nerve density measured as the total area of nerves (µm²) per mm². *p < 0.01 compared with matched control. Solid bars = LSGS; open bars = CNT. Abbreviations as in Figure 1.