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Intra-articular hyaluronic acid injection versus oral non-steroidal anti-inflammatory drug for the treatment of knee osteoarthritis: a multi-center, randomized, open-label, non-inferiority trial

Muneaki Ishijima*, Toshitaka Nakamura, Katsuji Shimizu, Kunihiko Hayashi, Hiraku Kikuchi, Satoshi Soen, Go Omori, Toshihiko Yamashita, Yuji Uchio, Junji Chiba, Yuki Ideno, Mitsuaki Kubota, Hisashi Kurosawa, Kazuo Kaneko and for the Research Group of Cartilage Metabolism

Arthritis Research & Therapy 2014, 16:R18  doi:10.1186/ar4446

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