Ginnerup-Nielsen, E M, Henriksen, M, Christensen, R, Heitmann, B L, Altman, R, March, L, Woolf, A, Karlsen, H & Bliddal, H 2019, ' Prevalence of self-reported knee symptoms and management strategies among elderly individuals from Frederiksberg municipality : protocol for a prospective and pragmatic Danish cohort study ', BMJ Open, vol. 9, no. 9, e028087 . https://doi.org/10.1136/bmjopen-2018-028087 Ginnerup-Nielsen, E M, Henriksen, M, Christensen, R, Heitmann, B L, Altman, R, March, L, Woolf, A, Karlsen, H & Bliddal, H 2019, ' Prevalence of self-reported knee symptoms and management strategies among elderly individuals from Frederiksberg municipality : Protocol for a prospective and pragmatic Danish cohort study ', BMJ Open, vol. 9, no. 9, e028087 . https://doi.org/10.1136/bmjopen-2018-028087 BMJ Open
Johansen, M, Bahrt, H, Altman, R D, Bartels, E M, Juhl, C B, Bliddal, H, Lund, H & Christensen, R 2016, ' Exploring reasons for the observed inconsistent trial reports on intra-articular injections with hyaluronic acid in the treatment of osteoarthritis : Meta-regression analyses of randomized trials ', Seminars in Arthritis and Rheumatism, vol. 46, no. 1, pp. 34–48 . https://doi.org/10.1016/j.semarthrit.2016.02.010