title: Letters: Comment on Solcia and Buffa's "Azo coupling of indole-reactive enterochromaffin cells".
mesh_terms: D000818:Animals; D001391:Azo Compounds; D002838:Chromaffin System / Q000166:cytology*; D004386:Duodenum / Q000166:cytology; D005069:Evaluation Studies as Topic; D005453:Fluorescence; D005976:Glutaral; D006168:Guinea Pigs; D006651:Histocytochemistry; D006652:Histological Techniques; D007211:Indoles; D008407:Mast Cells / Q000166:cytology; D008722:Methods; D051379:Mice; D051381:Rats; D013194:Staining and Labeling; D013997:Time Factors
chemical_list: D001391:Azo Compounds; D007211:Indoles; D005976:Glutaral