1. 1) REILAND, S. : Pathology of so-called leg weakness in the pig, Acta Radiol Suppl., 358, 23-44, 1978.
2. 2) OHATA, H. and S. KUSUHARA : Study regarding healthy leg features in pigs—Leg weakness and osteochondrosis—, Jpn. J. Swine Science, 38, 3, 151-162, 2001.
3. 3) KUSUHARA, S. : Leg weakness, edited by Mamoru Kashiwazaki, Hyology and Hyoiatrics (4th edition), 478-480, Kindai Shuppan, Tokyo, 1999.
4. 4) ARAI, S., S. ITOH, M. KACHI, Y. SUGIYAMA and S. KUSUHARA : Clinical Model of Leg Weakness Induced by Intraarticular Administration of Papain in Pigs, Jpn. J. Swine Science, 46, 183-189, 2009.
5. 5) BENTLEY, G. : Papain-induced degenerative arthritis of the hip in rabbits, J. Bone Joint Surg. Br., 53-B, 324-327, 1971.