title: Letter: Value of intraoperative tests in vagotomy.
mesh_terms: D004396:Coloring Agents; D004123:Dimethylamines; D005750:Gastric Juice / Q000378:metabolism; D006801:Humans; D010619:Phenazines; D014628:Vagotomy
chemical_list: D004396:Coloring Agents; D004123:Dimethylamines; D010619:Phenazines