Hewlett, Sarah, Ambler, Nick, Knops, Bev, Cliss, Alena, Almeida, Celia, Pope, Denise, Hammond, Alison, Swinkels, Annette, Kitchen, Karen, Pollock, Jon, "Reducing the Impact of Rheumatoid Arthritis Fatigue: A Randomized Controlled Trial of Cognitive Behavioural Therapy", Rheumatology, 2010