Secukinumab in patients with psoriatic arthritis and axial manifestations: results from the double-blind, randomised, phase 3 MAXIMISE trial by Baraliakos, X, Gossec, L, Pournara, E, Jeka, S, Varela, AM, D’Angelo, S, Schulz, B, Rissler, M, Nagar, K, Perella, C, Coates, LC