title: [Blue lips].
authors.forename: V
authors.initials: V
authors.lastname: Rantalaiho
authors.forename: P
authors.initials: P
authors.lastname: Lehto
authors.forename: T
authors.initials: T
authors.lastname: Salonen
mesh_terms: D000293:Adolescent; D003490:Cyanosis / Q000175:diagnosis* / Q000209:etiology; D003937:Diagnosis, Differential; D006801:Humans; D008046:Lip; D008297:Male; D008708:Methemoglobinemia / Q000097:blood / Q000150:complications / Q000175:diagnosis*; D011655:Pulmonary Embolism / Q000175:diagnosis*; D019966:Substance-Related Disorders / Q000150:complications