title: Blood grouping and epistaxis.
authors.forename: S
authors.initials: S
authors.lastname: Lewis
mesh_terms: D000017:ABO Blood-Group System; D000328:Adult; D000367:Age Factors; D000368:Aged; D001208:Asia / Q000208:ethnology; D001788:Blood Grouping and Crossmatching; D004630:Emergencies; D004844:Epistaxis / Q000208:ethnology / Q000209:etiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010343:Patient Admission / Q000706:statistics & numerical data; D012307:Risk Factors; D044465:White People
chemical_list: D000017:ABO Blood-Group System