Is there a difference in efficacy between steroid-sparing agents like methotrexate, mycophenolate, and azathioprine in the treatment of immune-mediated myopathies?  

Currently, there is no high-quality evidence favoring one immunosuppressive agent over another in the treatment of immune-mediated myopathies, as there are no head-to-head comparative trials and most available data come from small, observational, or retrospective studies. As a result, the choice of ...