The figure showing percentage of composition of unfractionated and low molecular weight heparin in terms of molecular weight is adapted from Levine GN, Ali MN, Schafer AI. Arch Intern Med 2001;161: 937-48.
Andrew D Blann is senior lecturer in medicine, Martin J Landray is lecturer in medicine, and Gregory Y H Lip is professor of cardiovascular medicine. All are at the haemostasis thrombosis and vascular biology unit, university department of medicine, City Hospital, Birmingham.
The ABC of antithrombotic therapy is edited by Gregory Y H Lip and Andrew D Blann. The series will be published as a book in Spring 2003.
