title: Presidential address: 'I am in blood...' (Macbeth act III scene IV).
authors.affiliation: Department of Haematology, London Hospital Medical College.
authors.forename: P J
authors.initials: PJ
authors.lastname: Lincoln
mesh_terms: D001788:Blood Grouping and Crossmatching; D001801:Blood Stains; D016172:DNA Fingerprinting; D005554:Forensic Medicine; D006708:Homicide; D006801:Humans; D008297:Male; D010334:Paternity