To compare the performance of a capture proteinase 3 enzyme linked immunosorbent assay (PR3 ELISA) with a direct PR3 ELISA in the measurement of PR3 antineutrophil cytoplasmic antibodies (ANCA).
Department of Rheumatology, Immunology and Allergy, Canterbury Health laboratories, Canterbury District Health Board, Christchurch, New Zealand. john.odonnell@cdhb.govt.nz
