title: Do high levels of IgA rheumatoid factor indicate a poor response to treatment with TNF inhibitors in patients with RA?
authors.affiliation: Musculoskeletal Research Group, Institute of Cellular Medicine, School of Clinical Medical Sciences, Newcastle University, Newcastle upon Tyne, UK. j.m.van-laar@ncl.ac.uk
authors.forename: Jacob M
authors.initials: JM
authors.lastname: van Laar