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Hoekstra, M., A E. van Ede, C. Haagsma, M A F J. van de Laar, T. Huizinga, M. Kruijsen, och R. Laan. Factors Associated With Toxicity, Final Dose, and Efficacy of Methotrexate in Patients With Rheumatoid Arthritis. 2003.

Hoekstra, M., et al. Factors Associated With Toxicity, Final Dose, and Efficacy of Methotrexate in Patients With Rheumatoid Arthritis. 2003.