RT Journal Article SR Electronic T1 Antinuclear antibodies by indirect immunofluorescence and solid phase assays JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP e65 OP e65 DO 10.1136/annrheumdis-2019-215443 VO 79 IS 6 A1 Xavier Bossuyt A1 Jolien Claessens A1 Ellen De Langhe A1 Thibaut Belmondo A1 Rene Westhovens A1 Sophie Hue A1 Koen Poesen A1 Daniel Blockmans A1 Michael Mahler A1 Marvin J Fritzler YR 2020 UL http://ard.bmj.com/content/79/6/e65.abstract AB