1. Heberden, W. Commentaries on the History and Cure of Diseases (ed. Payne, T. ) (London, 1802).
2. Garrod, A. B. The Nature and Treatment of Gout and Rheumatic Gout (Walton and Maberly, 1859).
3. Arden, N. & Cooper, C. in Osteoarthritis Handbook (eds Arden, N. & Cooper, C. ) 1–22 (Taylor and Francis, 2006).
4. Sellam, J. & Berenbaum, F. Is osteoarthritis a metabolic disease? Joint Bone Spine 80, 568–573 (2013).
5. Flores, R. H. & Hochberg, M. C. in Osteoarthritis (eds Brandt, K. D., Doherty, M. & Lohmander, L. S. ) 1–8 (Oxford Univ. Press, 2003).