title: Letter: The present puzzle.
mesh_terms: D001546:Bentonite / Q000627:therapeutic use; D005751:Gastric Lavage; D006801:Humans; D007422:Intestines; D010269:Paraquat / Q000506:poisoning*; D007507:Therapeutic Irrigation
chemical_list: D001546:Bentonite; D010269:Paraquat