[1] Univ Southampton, Salisbury, Wilts, England
[2] Med Klin 3, Mannheim, Germany
[3] Univ Turin, Turin, Italy
[4] IMVS, Adelaide, SA, Australia
[5] Univ Mediterranee, Marseilles, France
[6] Cornell Univ, Weill Med Coll, New York, NY 10021 USA
[7] NIBSC, S Mimms, Herts, England
[8] NGRL Wessex, Salisbury, Wilts, England