Comment on

• The effect of folic acid supplementation on the toxicity of low-dose methotrexate in patients with rheumatoid arthritis.

  Morgan SL, Baggott JE, Vaughn WH, Young PK, Austin JV, Krumdieck CL, Alarcón GS. Morgan SL, et al. Arthritis Rheum. 1990 Jan;33(1):9-18. doi: 10.1002/art.1780330102. Arthritis Rheum. 1990. PMID: 2405864 Clinical Trial.
• Folic acid supplementation and methotrexate efficacy: comment on articles by Schiff, Emery et al, and others.

  Strand V, Morgan SL, Baggott JE, Alarcón GS. Strand V, et al. Arthritis Rheum. 2000 Nov;43(11):2615-6. doi: 10.1002/1529-0131(200011)43:11<2615::AID-ANR38>3.0.CO;2-A. Arthritis Rheum. 2000. PMID: 11083294 No abstract available.
• Effect of folic or folinic acid supplementation on the toxicity and efficacy of methotrexate in rheumatoid arthritis: a forty-eight week, multicenter, randomized, double-blind, placebo-controlled study.

  van Ede AE, Laan RF, Rood MJ, Huizinga TW, van de Laar MA, van Denderen CJ, Westgeest TA, Romme TC, de Rooij DJ, Jacobs MJ, de Boo TM, van der Wilt GJ, Severens JL, Hartman M, Krabbe PF, Dijkmans BA, Breedveld FC, van de Putte LB. van Ede AE, et al. Arthritis Rheum. 2001 Jul;44(7):1515-24. doi: 10.1002/1529-0131(200107)44:7<1515::AID-ART273>3.0.CO;2-7. Arthritis Rheum. 2001. PMID: 11465701 Clinical Trial.