Kazushige SHIRAISHI, et al. “Mizoribine Is As Effective As Methotrexate for the Treatment of Polymyalgia Rheumatica: A Retrospective Case Series Analysis”. Archives of Rheumatology, vol. 33, no. 3, Sept. 2018, pp. 302-8, doi:10.5606/ArchRheumatol.2018.6418.