title: [Blood crusts on the bottom lip].
authors.affiliation: AZVU/ACTA, De Boelelaan 1117, 1081 HV Amsterdam.
authors.forename: I
authors.initials: I
authors.lastname: van der Waal
mesh_terms: D002648:Child; D003937:Diagnosis, Differential; D005260:Female; D006470:Hemorrhage / Q000209:etiology*; D006801:Humans; D008046:Lip / Q000473:pathology*; D008047:Lip Diseases / Q000209:etiology*