[1] Sahlgrens Univ Hosp, S-41345 Gothenburg, Sweden
[2] Royal Victoria Infirm, Newcastle Upon Tyne NE1 4LP, Tyne & Wear, England
[3] Immuno AG Wien, Vienna, Austria
[4] Univ Vienna, A-1010 Vienna, Austria
[5] John Radcliffe Hosp, Oxford OX3 9DU, England