XT-150-1-0201 Extension: Evaluation of Safety, Tolerability, and Efficacy of XT-150 for the Treatment of Osteoarthritic Pain.~Participants in this study will have been enrolled in the 0201 study and qualify for an intra-articular injection of XT-150 into the osteoarthritic knee.~The study will assess XT-150 safety, tolerability, and efficacy in participants who received placebo in the 0201 study, or have a second qualifying knee, or a second injection into the same knee that was treated in 0201.
XT-150 safety and efficacy in severe osteoarthritic pain.