Clinical and psychosocial stress factors are associated with decline in physical activity over time in children with juvenile idiopathic arthritis oleh Liane D. Heale, Kristin M. Houghton, Elham Rezaei, Adam D. G. Baxter-Jones, Susan M. Tupper, Nazeem Muhajarine, Susanne M. Benseler, Gilles Boire, David A. Cabral, Sarah Campillo, Gaëlle Chédeville, Anne-Laure Chetaille, Paul Dancey, Ciaran Duffy, Karen Watanabe Duffy, Janet Ellsworth, Jaime Guzman, Adam M. Huber, Roman Jurencak, Bianca Lang, Ronald M. Laxer, Kimberly Morishita, Kiem G. Oen, Ross E. Petty, Suzanne E. Ramsey, Johannes Roth, Rayfel Schneider, Rosie Scuccimarri, Lynn Spiegel, Elizabeth Stringer, Shirley M. L. Tse, Lori B. Tucker, Stuart E. Turvey, Rae S. M. Yeung, Alan M. Rosenberg, for the BBOP Study Group