NEFM and intrahepatic cholangiocarcinoma: Staining for 160 kDa neurofilament (NEFM), a marker of ganglion, amacrine and horizontal cells (Gutierrez, McNally, and Canto‐Soler 2011), was observed in cells cultured with FTRI only, staining of NEFM was not observed in the absence of FTRI in both ICC and RT‐PCR (Figure 5D,H, respectively).