Thrombosis and Haemostasis, Table of Contents Thromb Haemost 1995; 74(06): 1604-1606DOI: 10.1055/s-0038-1649989 Letter to the Editor Schattauer GmbH Stuttgart Clotting Factor Concentrates – Whither Purity? Duncan P Thomas M. D. Rowan Cottage, West End, Combe, Oxford OX8 8NP, UK › Author Affiliations Recommend Article Abstract PDF Download Buy Article PDF (162 kb) References References 1 Mannueci PM. Effects of Factor VIII concentrates on the immune system of patients with hemophilia. Thromb Haemost 1995; 74: 437-439 2 de Biasi R, Rocino A, Miraglia E, Mastrullo L, Quirino AA. The impact of a very high purity factor VIII concentrate on the immune system of human immunodeficiency virus-infected hemophiliacs: a randomized prospective two year comparison with an intermediate purity concentrate. Blood 1991; 78: 1918-1922 3 Seremitis S, Aledort LM, Bergman G, Bona R, Bray G, Brettler DB, Eyster ME, Kessler C, Lan TS, Lusher JM, Rickerts F. 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