[1] State Univ Ghent Hosp, B-9000 Ghent, Belgium
[2] Univ Erlangen Nurnberg, Erlangen, Germany
[3] Univ Hosp, Tours, France
[4] Royal Natl Hosp Rheumat Dis, Bath BA1 1RL, Avon, England
[5] St Olavs Hosp, Trondheim, Norway
[6] Silkeborg Centralsygehus, Silkeborg, Denmark
[7] Karolinska Univ Hosp, Stockholm, Sweden
[8] Univ Helsinki, Cent Hosp, Helsinki, Finland
[9] St Vincents Univ Hosp, Dublin, Ireland
[10] Abbott GmbH & Co KG, Ludwigshafen, Germany