J. van Aken

Association between HLA class II genes and autoantibodies to cyclic citrullinated peptides (CCPs) influences the severity of rheumatoid arthritis.

F. Breedveld, T. Huizinga, R. Toes, 2004, Arthritis and rheumatism.

The Leiden Early Arthritis Clinic.

C. Allaart, F. Breedveld, J. V. van Bilsen, 2003, Clinical and experimental rheumatology.

Efficacy of methotrexate treatment in patients with probable rheumatoid arthritis: a double-blind, randomized, placebo-controlled trial.

C. Allaart, M. Westedt, F. Breedveld, 2007, Arthritis and rheumatism.

Association between HLA class II genes and autoantibodies to cyclic citrullinated peptides (CCP) affects severity of rheumatoid arthritis

F. Breedveld, T. Huizinga, E. Zanelli, 2004, Arthritis Research & Therapy.

Radiological outcome after four years of early versus delayed treatment strategy in patients with recent onset rheumatoid arthritis

S. Cessie, F. Breedveld, S. le Cessie, 2004, Annals of the rheumatic diseases.

Comparison of long term outcome of patients with rheumatoid arthritis presenting with undifferentiated arthritis or with rheumatoid arthritis: an observational cohort study

S. Cessie, C. Allaart, F. Breedveld, 2005, Annals of the rheumatic diseases.

Five-year outcomes of probable rheumatoid arthritis treated with methotrexate or placebo during the first year (the PROMPT study)

C. Allaart, H. Ronday, T. Huizinga, 2013, Annals of the rheumatic diseases.

Hand function is already reduced before RA development and reflects subclinical tenosynovitis

A. H. M. van der Helm-van Mil, D. Krijbolder, X. Matthijssen, 2023, RMD Open.