TY  - BOOK
AU  - Matthijssen,Xanthe M.E.
AU  - Huizinga,Tom W.J.
AU  - van der Helm-van Mil,Annette H.M.
TI  - The increasing incidence of autoantibody negative RA is replicated and is partly explained by an aging population
PY  - 2022///-05-01
KW  - Text
KW  - local
N1  - /pmc/articles/PMC7612609; /pubmed/32471904
UR  - http://dx.doi.org/10.1136/annrheumdis-2020-217609
ER  -