248 Genome-wide association study of response to tumour necrosis factor inhibitor therapy in rheumatoid arthritis. (25th April 2018) - Massey, Jonathan; Plant, Darren; Hyrich, Kimme; Morgan, Ann W; Wilson, Anthony G; Spiliopoulou, Athina; Colombo, Marco; McKeigue, Paul; Isaacs, John; Pitzalis, Costantino; Barton, Anne