Von Willebrand disease http://www.nlm.nih.gov/medlineplus/ency/article/000544.htm Von Willebrand Disease http://www.nlm.nih.gov/medlineplus/ency/article/000544.htm http://www.nlm.nih.gov/medlineplus/ency/article/000544.htm http://www.nlm.nih.gov/medlineplus/ency/article/000544.htm von willebrand syndrome Von Willebrands Disease http://www.nlm.nih.gov/medlineplus/ency/article/000544.htm "Von Willebrand disease: MedlinePlus Medical Encyclopedia"