1. The Hemostasis and Thrombosis Research Unit, University, Hospital, Leiden, The Netherlands
2. The Istituto di Chimica Biologica, Università degli Studi Ferrara, Ferrara, Italy
3. The Laboratoire Hemostase, Hôpital Broussais, Paris, France
4. The Department of Biochemistry, University of Vermont, Burlington, Vermont, USA
5. The Department of Molecular Genetics, Hospital Duran i Reynals, I.R.O., Barcelona, Spain
6. The Charter Molecular Genetics Laboratory, Thrombosis Research Institute, London, UK