RT Journal Article SR Electronic T1 Von Willebrand disease JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 629 OP 632 DO 10.7861/clinmedicine.7-6-629 VO 7 IS 6 A1 Jonathan T Wilde YR 2007 UL http://www.rcpjournals.org/content/7/6/629.abstract AB