1. Institute of Medical Biochemistry; Vienna Bio Center, University of Vienna; Dr. Bohr-Gasse 9/3 A-1030 Vienna Austria
2. Centre d'InvestigaciÓ i Desenvolupament (CSIC); Jordi Girona Salgado 18-26 E-08034 Barcelona Spain
3. CIHR Group in Protein Structure and Function, Department of Biochemistry; University of Alberta; Edmonton Alberta T6G 2H7 Canada
4. Astra Zeneca; R & D Molndal S-431 83; Molndal Sweden