Pearce, F. A., Hubbard, R., Grainge, M. J., Watts, R. A., Abhishek, A., & Lanyon, P. C. (in press). Can granulomatosis with polyangiitis be diagnosed earlier in primary care? A case-control study. QJM: An International Journal of Medicine, https://doi.org/10.1093/qjmed/hcx194