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WHAT IS ALREADY KNOWN ABOUT THIS SUBJECT
• Methotrexate (MTX), which causes adverse effects, such as liver and/or renal dysfunction, is the most common disease‐modifying antirheumatic drug used for the treatment of rheumatoid arthritis and articular‐type juvenile idiopathic arthritis (JIA).
• Pharmacogenetic studies analysing the MTX pathway genes would aid in the development of more personalized...
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