Soul J, Dunn SL, Anand S, et al. Stratification of knee osteoarthritis: two major patient subgroups identified by genome-wide expression analysis of articular cartilage. Ann of Rheum Dis 2018;77:423–30. doi:10.1136/annrheumdis-2017-212603.
References 1 and 2 have been updated to:
1 Fernandez-Moreno M, Rego I, Carreira-Garcia V, et al. Genetics in Osteoarthritis. Curr Genomics 2008;9:542–7.
2 Panoutsopoulou K, Southam L, Elliott KS, et al. Insights into the genetic architecture of osteoarthritis from stage 1 of the arcOGEN study. Ann Rheum Dis 2011;70:864–7.