Correspondence on "Methotrexate treatment in hand osteoarthritis refractory to usual treatments: A randomised, double-blind, placebo-controlled trial" by Ferrero et al
1 School of Medicine, Chung Shan Medical University, Rm. 201, 2F., No. 522, Fuxing N. Rd., South District, Taichung City 402028, Taiwan.
2 School of Medicine, Chung Shan Medical University, Rm. 201, 2F., No. 522, Fuxing N. Rd., South District, Taichung City 402028, Taiwan. Electronic address: kaoanson@icloud.com.