title: The "blue" people with "chocolate" blood--methemoglobinemia.
mesh_terms: D006801:Humans; D008708:Methemoglobinemia / Q000139:chemically induced*; D009566:Nitrates / Q000506:poisoning; D009573:Nitrites / Q000506:poisoning
chemical_list: D009566:Nitrates; D009573:Nitrites