Article:  Optical clearing improves 3-D imaging of human enteric nervous system  (2011, Neurogastroenterology & Motility)

 
Article:  3-D illustration of ICC network orientations  (2012 AJP-GI)
 

3-D imaging, illustration, and quantitation of enteric glial network in transparent human colon mucosa (2013 NG&M)

 
Whole-villus neurohistology with optical clearing  (2014 DDW abstract)
Whole-villus visualization of the tissue microstructure, vasculature, and innervation. (A) Optical clearing of human ileal villi.  (B) Projection of the serotonin cells (magenta) and the enteric nerve fibers (green) underneath the epithelium (blue).  (C) Projection of the villus microvessels (red) and the associated glial network (green).  Bar: 100 μm.
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Article:  Perivascular Interstitial Cells of Cajal in Human Colon  (2015 CMGH, AGA official journal, IF: 9.225) 
http://cmghjournal.org/article/S2352-345X(14)00007-1/fulltext