https://onlinelibrary.wiley.com/doi/...1002/ana.25002

This study compares the effect of Rituximab versus placebo on SPS, and interprets it. I like the fact that the lack of difference between Rituximab and Placebo can be seen as scales that cannot quantify levels of stiffness, as opposed to ineffectiveness of Rituximab— rather than simply writing it off as ineffective.