From the study at http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0129898 http://journals.plos.org/plosone/article?id=10.1371/journal.... : "A

From the study at http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0129898 http://journals.plos.org/plosone/article?id=10.1371/journal.... : "According to protocol for the previous randomized KTS-1-2008 study, patients assigned to the placebo group should be given the opportunity to participate in a new open-label study with rituximab. The protocol for the present study was designed to learn about the therapeutic efficacy of rituximab maintenance treatment, for response rates and response durations. Also, the experiences could form the basis for design of a future randomized, double-blind and placebo-controlled trial."