High-Intensity Exercise Improves Fatigue, Sleep, and Mood in Patients With Axial Spondyloarthritis: Secondary Analysis of a Randomized Controlled Trial. - Sveaas, Silje Halvorsen; Dagfinrud, Hanne; Berg, Inger Jorid; Provan, Sella Arrestad; Johansen, Melissa Woll; Pedersen, Elisabeth; Bilberg, Annelie (Physical Therapy, 2020)