OMICS International OMICS International is a scientific organization that drives the progress of research through open access journals and organizes international conferences, The best in science news, commentary, and research. Journal of Pain & Relief Journal of Pain & Relief Volume 7, Issue 4 Neuralgic and Nociceptive Pain in the Knee as a Cause of the Treatment Failure after Cartilage Repair Surgery Two Case Reports Nenad Andjelkov, Hasan Riyadh and Per Wretenberg