D Gladman1, R Fleischmann2, B Szegvari3, L Peterson4, P J Mease5. 1. Toronto Western Research Institute, Toronto, Ontario, ON, Canada. 2. Metroplex Clinical Research Center, Dallas, TX, USA. 3. UCB Pharma, Brussels, Belgium. 4. UCB Pharma, Raleigh, NC, USA. 5. Swedish Medical Center and University of Washington, Seattle, WA, USA.