TRPM8 and intrahepatic cholangiocarcinoma: To validate the specificity of these two antibodies, both ICC and IHC were repeated using DRG-cultured cells and slices from TRPM8 KO mice (Trpm8EGFPf; B6;129S1(FVB)-Trpm8tm1Apat/J) [25] that express farnesylated EGFP instead of TRPM8 (i.e., EGFP marks neurons that should have expressed TRPM8).