(a,b) Optical micrographs of human ganglia from the thoracolumbar region stained with H&E. (b) Higher magnification of the micrograph in panel a. (c,d) Optical micrographs of human ganglia from the thoracolumbar region stained with an antibody against CD68. (d) Higher magnification of the micrograph in panel c. (e) Optical micrographs of human ganglia from the thoracolumbar region stained with an antibody against CD68 and Slc6a2. Red arrows, CD68- and Slc6a2- double positive regions. (f) Optical micrographs of human ganglia from the thoracolumbar region stained with an antibody against CD68 and MAOa. Red arrows, CD68- and MAOa- double positive regions. Boxed regions in panels e and f represent higher magnification of the main micrographs. Scale bars for a and c, 1 mm, for c and d, 100 μm, for e and f, 50 μm, for boxed regions 25 μm. Images in a-f are representative of 9 different human samples.