Combined inhibition of tumour necrosis factor-alpha and interleukin-12/23 for long-standing, refractory psoriatic disease: a differential role for cytokine pathways?. (4th July 2018) - De Marco, Gabriele; McGonagle, Dennis; Mathieson, Hannah R; Merashli, Mira; Magee, Conor; FitzGerald, Oliver; Goodfield, Mark; Marzo-Ortega, Helena