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    van Wesemael, T., Muhammad, A., Symmons, D., MacGregor, A., Barton, A., Trouw, L., Huizinga, T., Toes, R., Verstappen, S., & van der Woude, D. (n.d.). tHU0040 In Rheumatoid Arthritis, Smoking is not Associated with Anti-Citrullinated Protein Antibodies (ACPA) Per SE, but with the Concurrent Presence of Rheumatoid Factor, Acpa and Anti-Carbamylated Protein Antibodies. Annals of the rheumatic diseases, 74, 206–207. http://access.bl.uk/ark:/81055/vdc_100135161153.0x000051