title: Letter: Role of insulin glucagon feed back system.
mesh_terms: D000818:Animals; D001786:Blood Glucose / Q000378:metabolism*; D005246:Feedback; D005934:Glucagon / Q000097:blood*; D007328:Insulin / Q000097:blood*
chemical_list: D001786:Blood Glucose; D007328:Insulin; D005934:Glucagon