2010, Spa therapy in the treatment of knee osteoarthritis: a large randomised multicentre trial 7. Februar 2022 Forestier R, Desfour H, Tessier M, Francon A, Foote AM, Genty C. Ann. Rheum.Dis.2010;69(4):660-665. (PMC free article). https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2927613/